He’s got millions, and his own plush 727, and he’s threatening to use both to shake up the 2012 presidential race.

Donald Trump at the Conservative Political Action Conference (CPAC) in Washington in February. (AP Photo/Alex Brandon)

In an interview with ABC’s Good Morning America, developer Donald Trump says he is looking seriously at jumping into the GOP primary battle, and may run as an independent in the general election if he fails to win the nomination. “Part of the beauty of me is that I am very rich,” he said, adding that he was prepared to toss in $600 million of his own cash to fund a campaign.

Whatever Mr. Trump’s appeal, cash like that could make a dent in the general election, and complicate life for whomever wins the Republican nomination. In a recent Newsweek/Daily Beast poll, 41% of Republicans and independents said they would vote for Mr. Trump in a head-to-head election against President Barack Obama—more than would support former Alaska Gov. Sarah Palin in a similar match up.

In typical scattershot style, Mr. Trump said he is serious about making a run this time around, and would be the right fit for the times. “I do good deals, that’s what I do. I think this country needs someone who can do good deals.”…