"Just try to imagine Mister Rogers playing the agent Ari in 'Entourage' and it all falls into place."

David Brooks explains Barack Obama. Supposedly, there are 2 sides to Barack Obama — the familiar idealistic guy and the "the promise-breaking, tough-minded Chicago pol who’d throw you under the truck for votes." Brooks gives a few examples, but the heart of the column is the turnaround on public financing:

Barack Obama has worked on political reform more than any other issue.... He’s spent much of his career talking about how much he believes in public financing. In January 2007, he told Larry King that the public-financing system works. In February 2007, he challenged Republicans to limit their spending and vowed to do so along with them if he were the nominee. In February 2008, he said he would aggressively pursue spending limits. He answered a Midwest Democracy Network questionnaire by reminding everyone that he has been a longtime advocate of the public-financing system.

But Thursday, at the first breath of political inconvenience, Fast Eddie Obama threw public financing under the truck. In so doing, he probably dealt a death-blow to the cause of campaign-finance reform. And the only thing that changed between Thursday and when he lauded the system is that Obama’s got more money now.

It's fine with me. I don't like the campaign finance scheme. And I like a practical politician who adjusts to changing circumstances. It's good news that he's not an ideologue. I don't think he's going to lose the people who fell in love with him as a vision of idealism. I think he's going to gain moderate people like me who want an effective, sensible leader.

ADDED: Here's the video of Obama justifying his decision and making it sound as though McCain is slimy for staying in the system. Here's FactCheck's analysis:

Obama: We face opponents who’ve become masters at gaming this broken system. John McCain’s campaign and the Republican National Committee are fueled by contributions from Washington lobbyists and special interest PACs.

To say that either the McCain campaign or the RNC are "fueled" by money from lobbyists and PACs is an overstatement, to say the least. Such funds make up less than 1.7 percent of McCain's presidential campaign receipts and 1.1 percent of the RNC's income.

McCain – As of the end of April, the McCain campaign had reported receiving $655,576 from lobbyists, according to the Center for Responsive Politics. That is less than seven-tenths of 1 percent of his total receipts of $96,654,783. His campaign also took in $960,990 from PACs, amounting to just under 1 percent of total receipts. The two sources combined make up less than 1.7 percent of his total.

RNC – The Republican National Committee has raised $143,298,225, of which only $135,000 has been come from lobbyists, according to the CRP. That's less than one-tenth of 1 percent. It also took in about 1 percent of its receipts from PACs, CRP said. Taken together, that's about 1.1 percent from PACs and lobbyists.