(CBS News) Below is a rush transcript of "Face the Nation" on May 6, 2012, hosted by CBS News chief Washington correspondent Bob Schieffer. Guests include former former Republican presidential candidates former House Speaker Newt Gingrich and Rep. Michele Bachmann, R-Minn. Then the Democratic take with Sen. Chuck Schumer, D-N.Y. and former Vermont Governor Howard Dean. Zbigniew Brzezinski on the Chinese dissident situation, and a politics panel on Campaign 2012.
BOB SCHIEFFER: Today on FACE THE NATION, and they're off. And we're not talking Kentucky Derby. We're talking campaign 2012.
PRESIDENT BARACK OBAMA: We've come too far to abandon the change we fought for these past few years. We have to move forward. That's why I'm running for a second term as President of the United States.
BOB SCHIEFFER: The President was everywhere from the battleground political states to Afghanistan, where he marked the one-year anniversary of the death of Osama bin Laden. Mitt Romney said fine, but--
MITT ROMNEY (CBS THIS MORNING): And the idea to try and politicize this and to say, "Oh, I, President Obama, would have done it one way, Mitt Romney would have done it another" is really disappointing.
BOB SCHIEFFER: With Romney now all, but, certain to get the Republican nomination, former rival Michele Bachmann settled her differences and endorsed him.
MICHELE BACHMANN: Yes, he not only can win. He will win. He will be the President.
BOB SCHIEFFER: No endorsement yet from Newt Gingrich, but he finally quit.
NEWT GINGRICH: I thought, frankly, in my role as providing material for Saturday Night Live, it was helpful.
BOB SCHIEFFER: We will talk with both of them about where Republicans go from here. And we'll get the Democrat side of where the campaign stands from New York Senator Chuck Schumer, and former presidential candidate and one-time chairman of the Democratic Party, Howard Dean.
On page two, we'll talk with a leading voice on foreign policy, Zbigniew Brzezinski, about the case of the Chinese dissident, and we'll try to put it in perspective with analysis from Peggy Noonan of the Wall Street Journal, Michael Gerson of the Washington Post, David Corn of Mother Jones magazine, and our own John Dickerson.
All that plus the highlights from the Republican primary campaign because--
RICK PERRY: Oops.
BOB SCHIEFFER: --this is FACE THE NATION.
ANNOUNCER: From CBS News in Washington FACE THE NATION with Bob Schieffer.
BOB SCHIEFFER: And good morning again, and welcome to FACE THE NATION. We begin this morning with two former Republican candidates and former House speaker Newt Gingrich and Congresswoman Michele Bachmann. Mister Gingrich, why don't we just start with you? Was it worth it?