(CBS News) Below is a rush transcript of "Face the Nation" on April 29, 2012, hosted by CBS News chief Washington correspondent Bob Schieffer. Guests include former Mississippi Governor Haley Barbour, Los Angeles Mayor Antonio Villaraigosa and California Governor Jerry Brown. A roundtable of terrorism experts include journalists Graham Allison and Peter Bergen, The Washington Post's David Ignatius and CBS News' John Miller. And CBS News' John Dickerson hosts a Google + Hangout on immigration.
BOB SCHIEFFER: Today on FACE THE NATION, are you ready for the campaign? You better be because the candidates have been all but chosen, and the race is on.
MITT ROMNEY: Hold on a little longer. A better America begins tonight.
BOB SCHIEFFER: Well, there may be some who disagree with that, but even Newt Gingrich conceded the Republican standard bearer will be Mitt Romney.
NEWT GINGRICH: I think, obviously, that I would be a better candidate. But the objective fact is the voters didn't think that.
BOB SCHIEFFER: So while Romney was wrapping up the Republican nomination, the Democrat's candidate was--well, it's easier to show than explain.
JIMMY FALLON: What is it?
PRESIDENT BARACK OBAMA: Jimmy, POTUS stands for President of the United States.
MAN (singing): He is the POTUS with the most-est.
PRESIDENT BARACK OBAMA: Let's keep the rates down on college loans.
JIMMY FALLON: Stop. The loan you save may be your own.
BOB SCHIEFFER: We'll talk politics with former Mississippi governor Haley Barbour, California Governor Jerry Brown, and Los Angeles Mayor Antonio Villaraigosa, who is chairman of the Democratic National Convention.
This week's Google Hangout is about Hispanic voters.
And we'll mark the one-year anniversary of the death of Osama bin Laden. We'll get new details on how the United States tracked him down and whether his death has made us safer. We'll hear from two TIME Magazine contributors, Harvard Professor Graham Allison; and Peter Bergen, author of Manhunt.
And plus, Washington Post columnist David Ignatius, and our own CBS News senior correspondent John Miller.
JOE BIDEN: If you're looking for a bumper sticker to sum up how President Obama has handled what we inherited, it's pretty simple--Osama bin Laden is dead and General Motors is alive.
BOB SCHIEFFER: American politics and American safety in the age of terrorism on FACE THE NATION.
ANNOUNCER: From CBS News in Washington FACE THE NATION with Bob Schieffer.
BOB SCHIEFFER: And good morning, again. If the people on the Sunday show seem a little sleepy this morning, it is because this is the morning after the White House Correspondents' Dinner. Washington's version of the Oscars which comes complete with its own red carpet, crowded with stars of television, Hollywood, both the two-legged and four-legged kind, government, and journalism. The star is always whoever happens to be President, and last night was no exception.
PRESIDENT BARACK OBAMA: My fellow Americans, we gather during a historic anniversary. Last year at this time, in fact on this very weekend, we finally delivered justice to one of the world's most notorious individuals.
I know at this point many of you are expecting me to go after my likely opponent, Newt Gingrich. Newt, there's still time, man.
But I'm not going to do that. I'm not going to attack any of the Republican candidates. Take Mitt Romney. He and I-- he and I actually have a lot in common. We both think of our wives as our better halves. And polls show to a-- an alarming insulting extent, the American people agree.
We also both have degrees from Harvard. I've one. He has two. What a snob.
And just to set the record straight, I really do enjoy attending these dinners. In fact, I had a lot more material prepared, but I-- I have to get the Secret Service home in time for their new curfew.
BOB SCHIEFFER (laughing): And on to serious business this morning, and here to talk a little politics, the man who will be the chairman of the Democratic National Convention this summer, the mayor of Los Angeles and Tony Ovilla-- Villaraigosa, and the former Republican governor of Mississippi who is also the former chairman of the Republican Party, Haley Barbour.
Gentlemen, thanks to both of you for coming. Let me start with you, Governor Barbour. Governor Romney seems pretty confident when he sat down with Diane Sawyer last week and she asked him what message he had for the President. He said, "Start packing." And then the other night after he won some more primaries, he said, "A better America begins tonight." Is it time to start measuring curtains in the Oval Office yet?
HALEY BARBOUR (Former Mississippi Governor/Former Republican National Committee Chairman) (voice overlapping): No, but I think a lot--