Following months of speculation, the former vice president officially jumped into the 2020 race with a short video focused on Trump's response to the violent August 2017 white supremacist rallies in Charlottesville.
Biden campaigned for congressional candidates in Iowa, South Carolina, California and Nevada in 2018, but has yet to visit any early states in 2019.
"The core values of this nation, our standing in the world, our very democracy, everything that has made America — America — is at stake."
On May 14, Bullock became the 22nd candidate to enter the race for the 2020 Democratic presidential nomination. And he’s hoping to set himself apart as a Democratic governor from a state that Trump won by 20 points.
The Montana governor has made more than half a dozen trips to Iowa since he began weighing a 2020 run.
"We must keep fighting against the outsized influence corporations and special interests have on our democracy — Americans deserve no less."
Mayor of South Bend, Ind., 37
The 37-year-old openly gay Democrat with a funny name was the second mayor to join the race. Just three former mayors have ever become president, and all of them held other offices before running for the White House.
Buttigieg has crisscrossed the country, and raised more than $7 million, following a breakout performance at a CNN town hall in March.
“It is a season for boldness and it is time to focus on the future.”
The Maryland congressman, who in 2017 became the first Democratic candidate to declare a 2020 bid, had an 18-month head start to set up field operations in early voting states like Iowa.
Delaney is currently completing his second tour of all 99 Iowa counties.
"The American people are far greater than the sum of our political parties. It is time for us to rise above our broken politics and renew the spirit that enabled us to achieve the seemingly impossible."
U.S. representative from Hawaii, 37
Gabbard's nascent presidential bid got off to a rocky start. Less than a week after she announced her 2020 candidacy, she issued an apology for antigay views she expressed in the past. The Iraq war veteran has also faced criticism for a secret meeting with Syrian dictator Bashar Assad in Damascus in 2017 at the height of that country’s devastating civil war.
The New York senator is running on an all-purpose list of popular Democratic issues: for health care and education reform and against racism, corruption, corporate greed and the influence of special interests. And, of course, Donald Trump.
Gillibrand has visited all early-voting states, including multiple trips to Iowa.
“I’m going to run for president of the United States because as a young mom I’m going to fight for other people’s kids as hard as I would fight for my own.”
The former California attorney general and ex-San Francisco district attorney launched her 2020 presidential campaign at a high-profile rally that drew a crowd of nearly 20,000 in Oakland, where she defended her career as a prosecutor.
Harris has already visited South Carolina, Iowa, New Hampshire and Nevada.
“We were raised by a community with a deep belief in the promise of our country and a deep understanding of the parts of that promise that still remain unfulfilled."
The Washington governor is running on a single-issue platform to combat climate change.
New Hampshire, Iowa, Nevada.
"[Trump] is wrong about the basic character of the American people, and he is wrong about the science of climate change. And that’s going to be proven in the next election cycle if I have anything to do about it.”
U.S. senator from Minnesota, 58
The Senate Judiciary Committee fixture, who has faced allegations of habitual mistreatment of her staff, announced her candidacy at a snow-swept rally in Minneapolis in February.
Klobuchar conducted town halls in New Hampshire and Iowa shortly after announcing her candidacy.
"I am running for every American. I'm running for you."
The Miramar, Fla., mayor launched his unlkely presidential bid by highlighting his roots as the son of Jamaican immigrants.
Messam recently visited South Carolina.
“My father came to this country from Jamaica as a contract sugarcane cutter, chasing the American dream. And I’m living that American dream. But I see that American dream slipping away for a lot of people.”
U.S. representative from Massachusetts, 40
The Massachusetts congressman, who served four tours of duty in Iraq as a Marine, announced his 2020 bid on April 22. His pitch: America needs someone not afraid of "standing up to a bully like Donald Trump."
Moulton spent time in Iowa and New Hampshire in 2018, and recently visited the Granite State again.
"I believe it’s time for a new generation of leadership, and we gotta send Donald Trump packing.”
U.S. representative from Texas, 46
The former Texas congressman, who lost a bid to unseat Republican incumbent Sen. Ted Cruz in a surprisingly competitive 2018 U.S. Senate race, announced his bid for the Democratic nomination in March.
O'Rourke has visited more cities and towns than any other candidate in the 2020 presidential race.
“It’s hard to make a rational case for an emergency declaration or troops on the border or any amount of additional border wall or border fencing or steel slats. The border has never been as safe and secure as it is now."
The moderate Democrat from Ohio announced his presidential bid in an appearance on ABC's "The View." He said his daughter inspired him to run.
Ryan headed to Iowa and New Hampshire in mid-February.
"A divided country is a weak country, and I’m concerned about that."
U.S. senator from Vermont, 77
The Vermont independent senator and 2016 Democratic presidential candidate formally found himself in an unfamiliar position shortly after announcing his candidacy for the party's 2020 nomination — as a frontrunner.
Sanders has visited all early-voting states as well as California, and will head to Wisconsin, Michigan and Pennsylvania in mid-April.
"Our 2016 campaign began the political revolution. Now, it is time to complete that revolution and implement the vision that we fought for."
The Massachusetts senator formally launched her presidential campaign amid controversy over her Native American ancestry. Warren has since rolled out more policy proposals than virtually any other candidate.
Warren has visited all of the early-voting states as well as California and Mississippi.
"The man in the White House is not the cause of what is broken, he is just the latest and most extreme symptom of what's gone wrong in America. A product of a rigged system that props up the rich and powerful and kicks dirt on everyone else."
The Massachusetts congressman, whose family name almost guarantees his inclusion on lists of potential Democratic candidates, has repeatedly said he isn't interested in running for president in 2020. And in February, Kennedy endorsed Elizabeth Warren for president at her campaign launch rally.
“The state of our union is hopeful, resilient, enduring.”
The junior senator from Connecticut, who has become an outspoken critic of President Trump, has been mentioned as possible presidential contender. But his name has cropped up more often on lists of potential running mates for the 2020 Democratic ticket.
No early-state visits.
"100 people die from guns every day. That’s a national emergency."
Governor of Rhode Island, 47
The moderate Democratic governor of Rhode Island told the New York Times she is not interested in a presidential bid.
No early-state visits.
"It takes a lot of spine to be a centrist in America today."
Former daytime television host, 65
The talk show icon fueled some 2020 buzz last year when her best friend, Gayle King, said she was thinking about a possible presidential run and Winfrey, herself, gave a rally-like speech at the Golden Globes. But she has since pulled back on her bid talk.
No early-state visits.
"Speaking your truth is the most powerful tool we all have."
Former mayor of New York, 77
The former New York City mayor and billionaire philanthropist flirted with a Democratic presidential bid. But he decided the field was too crowded and will, instead, work to defeat Trump by supporting the party's nominee.
Bloomberg traveled to Iowa and New Hampshire in early 2019.
“It’s clear that this president, at this point, cannot be helped.”
U.S. senator from Ohio, 66
The progressive Democratic senator, who cruised to reelection in Ohio in 2018, embarked on a listening tour of all four early primary states to test out his Midwestern populist message. But in early March, he announced that he would not seek the presidency, saying, “I will keep calling out Donald Trump and his phony populism.”
Brown visited Iowa, New Hampshire, Nevada and South Carolina. He fundraised in California as well.
“I’ll put up my progressive bona fides up against anybody."
Despite being one of the most unfavorable politicians in the country, the 2016 Democratic nominee reportedly told friends she was not ruling out another run for the presidency. Clinton, though, ultimately did rule out a run.
"The real national emergencies: Relentless gun violence. Children separated from their families at the border. Climate change. Americans dying for lack of health care."
The Oregon senator, who is one of the few Democrats to endorse Bernie Sanders's presidential bid in 2016, said in December that he was considering his own run for the presidency on a similarly progressive platform. Merkley, though, later ruled that out.
Merkley visited Iowa after the 2018 election, and campaigned elsewhere in 2018; he even hired staff in Iowa and New Hampshire.
"America is a democratic republic. Not a dictatorship. Not a monarchy. In America, the people have the power."