Liveblogging the 2012 Michigan and Arizona primary results with Jeff Greenfield, Yahoo News & ABC News

As the results of the Republican presidential primaries in Michigan and Arizona come in on Tuesday night, read and contribute to our primary results liveblog, which will feature real-time discussion and analysis from Yahoo News and ABC News journalists, as well as tweets from Yahoo News reporters on the ground in Michigan and Arizona. You can follow the liveblog below, or go to this page, which has been optimized for tablet and mobile devices.

The liveblog will feature, among others, Walter Shapiro, who writes the "Character Sketch" column for Yahoo News; Chris Suellentrop, the deputy editor for blogs at Yahoo News, including The Ticket; and Z. Byron Wolf, the political editor of ABCNews.com and a deputy political director for ABC News.

Also participating will be Jeff Greenfield.

Jeff Greenfield, a veteran political correspondent and the host of PBS' "Need to Know," is the author, most recently, of Then Everything Changed, which will be published in paperback next month.

Our conversation begins at 8:45 p.m. ET.

Read more coverage of the 2012 Michigan and Arizona primaries at Yahoo! News.

More popular Yahoo! News stories:

• Fighting drugs and border violence in America's most dangerous national park: What about the ranger's M14 rifle, Yogi?

• Rick Santorum's daughter Elizabeth holds a town hall for dad: Scenes from the Michigan and Arizona primaries

• Obama rebukes Santorum on education 'snob' charge, points to policy on community colleges, worker training

Want more of our best political stories? Visit The Ticket or connect with us on Facebook, follow us on Twitter, or add us on Tumblr. Handy with a camera? Join our Election 2012 Flickr group to submit your photos of the campaign in action.