Coming Up on 'This Week': David Plouffe and Rep. Michele Bachmann

WASHINGTON, March 22, 2012— -- As the White House goes into campaign mode, Obama senior advisor David Plouffe goes one-on-one with George Stephanopoulos, Sunday on "This Week."

As Mitt Romney moves closer to the Republican presidential nomination, what kind of threat does he pose to President Obama's bid for a second term? As the president doubles down on his energy plan, will pain at the pump spell political trouble? And will big-time spending cuts proposed by congressional Republicans set up an election-year battle over the budget?

David Plouffe makes his case for President Obama's re-election, Sunday on "This Week."

Then, two years after President Obama signed his health care bill into law, "Obamacare" faces its toughest challenge yet. Will it survive the Supreme Court?

On the eve of opening arguments, one of the most vocal opponents of the health care law, former Republican presidential candidate Rep. Michele Bachmann, R-Minn., comes to "This Week." And now that she's out of the race, she says it's time for unity in the Republican party. But is she ready to back a candidate?

Plus, after scoring a decisive win in the Illinois primary, Mitt Romney's team makes a major gaffe comparing his campaign to an Etch A Sketch. Will Romney's "reset" strategy give new life to his Republican opponents, or is it only a matter of time before he secures the nomination?

Our powerhouse roundtable -- with ABC's George Will and Cokie Roberts, Democratic strategist and ABC News contributor Donna Brazile, political strategist and ABC News political analyst Matthew Dowd, and "Nightline" co-anchor Terry Moran -- debates all the week's politics, plus the growing controversy over the shooting death of Florida teenager Trayvon Martin.

See the whole political picture, Sunday on "This Week."