Mark Sanford said that GOP leaders went along with Trump 'hijacking' the party because it 'had come to stand for surprisingly little'

• In his new book, Sanford argues that conservatism as defined by the GOP had lost its way before Trump.

• "Reality was the Republican Party didn't really represent conservatism any longer," he wrote.

• The South Carolina lawmaker lost his GOP House primary in 2018 after criticizing Trump.

• See more stories on Insider's business page.

Mark Sanford, a longtime conservative lawmaker from South Carolina, viewed the Republican Party through a critical lens long before former President Donald Trump took office in 2017, as he detailed in his newly-released book, "Two Roads Diverged."

"Before Donald Trump's arrival in Washington, the conservative movement as represented by the Republican Party had devolved into a lukewarm mess," he wrote. "Reality was the Republican Party didn't really represent conservatism any longer."

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Sanford, who was serving in the House during Trump's first presidential campaign, argued that even before the former president entered the Oval Office, conservatism as defined by the GOP was in decline. He pointed out Trump's conduct on Inauguration Day, linking it to the Republican Party's acceptance of the then-president's increasing hold over the party.

"I remember being struck by the way Trump did not include his wife as he walked up to the edge of the dais and took in the moment and the adulation of the crowd that stretched before him," Sanford wrote. "I watched Melania intently, wondering what she was thinking. All I knew was there was no way my former wife, Jenny, nor the wife of any friend would have put up with this."

He added: "What I didn't appreciate in that moment was how Melania's nonreaction of placid indifference to Trump's behavior would be mirrored by millions. As the band took up 'Hail to the Chief,' there was not a whisper from any of the party leaders that Trump was hijacking the Republican brand. Why would there be? You can't change what you no longer have, and people generally don't get agitated about losing something that is not theirs."

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Sanford was elected in 1994 to represent a South Carolina Lowcountry House district as part of the "Republican Revolution," a conservative electoral wave driven by then-Rep. Newt Gingrich of Georgia that flipped both chambers of Congress to the Republican Party that year.

Adhering to a message of fiscal discipline, low taxes, and a strong national defense, Sanford was known as a true believer who was unwavering in his principles. After his first stint in the House from 1995 to 2001, he served as governor of South Carolina from 2003 to 2011.

While in the Governor's Mansion, Sanford's political career took a tumble in 2009 after he disclosed having an extramarital affair with María Belén Chapur, a woman from Argentina, after he went missing for six days while secretly visiting the country.

However, he recovered politically and rejoined Congress in 2013 after winning a special election for his old seat.

Sanford argued in his book that Trump encountered minimal resistance as he reshaped the GOP because it no longer held firm to its principles.

"There was no strong objection within Republican circles to what Trump began to change in the Grand Old Party because to many of them, the GOP had come to stand for surprisingly little," he wrote. "The people who truly believed in conservative ideals were disillusioned and tired of the Republican Party's abysmal efforts to advance their ideas."

While in office, Trump was able to muscle through the 2017 tax reform bill, which lowered the top corporate tax rate from 35 percent to 21 percent, along with installing a raft of conservative judges to the federal bench, but Sanford was less-than-impressed with the then-president.

After Sanford publicly clashed with Trump, who called the then-congressman "nothing but trouble," he lost the GOP primary for his House seat in 2018 to state legislator Katie Arrington, who went on to lose the general election to Democrat Joe Cunningham in what was considered a major upset.

In his book, Sanford said that if someone was asked what the GOP represented they might say "it stands for freedom," but noted that "Trump's style was far too autocratic to allow that answer to stick, and his flirtations with leaders like Vladimir Putin undercut the GOP's moral high ground on freedom."

He added: "Let's sit down at the proverbial kitchen table and make a more forward-looking list of what it should mean to be a Republican and a conservative today. Call it Barry Goldwater 2.0 or a modern-day Conscience of a Conservative, or even plain common sense, but we desperately need a conservative conscience, and more so, we need its timeless principles to be applied to the challenges of the day."

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