Coming Up on 'This Week': Ron Paul and Michele Bachmann

WASHINGTON, Dec. 30, 2011— -- The GOP presidential candidates make their final push in Iowa, with just days before voters caucus on Jan. 3. Two candidates who have squared off repeatedly on the campaign trail, Rep. Ron Paul and Rep. Michele Bachmann, come to "This Week" this Sunday.

Will Ron Paul's ground game and fervent supporters be the key to pulling off a victory in Iowa? Can he withstand the furious last-minute attacks from opponents like Bachmann who say he would be a "dangerous" president?

As time runs out for Bachmann to salvage her presidential hopes, can she survive a high-profile defection from her campaign team? And can she persuade social conservatives to keep her campaign alive, or will Iowa be her last stand?

Paul, who is a Texas congressman, and Bachmann, a Minnesota congresswoman, speak to senior White House correspondent Jake Tapper, Sunday on "This Week."

Mitt Romney has moved to the front of the pack in the latest Iowa polls, former front-runner Newt Gingrich tumbled 20 points in 20 days, and Rick Santorum had made a late surge. Can Romney finally win over undecided voters and take a commanding lead for the GOP nomination? Who will make it out of Iowa with a ticket to compete in New Hampshire and beyond?

Iowa Gov. Terry Branstad comes to "This Week" for his take on the competing candidates before Iowa's votes are cast next week. Plus, ABC News' senior political correspondent Jonathan Karl and Radio Iowa's O. Kay Henderson report from Des Moines on how the campaigns are wooing GOP voters on the ground in the final days.

In Washington, the "This Week" political roundtable breaks down all the latest campaign politics in this unpredictable race, with ABC News political analyst Matthew Dowd, Neera Tanden of the Center for American Progress, Washington Examiner chief political correspondent and Fox News contributor Byron York, and former Iowa Republican Party political director Craig Robinson, founder and editor-in-chief of The Iowa Republican.