The general’s camp is being coy about what he might or might not say on Sunday. But some McCain advisers suspect, without being sure, that Powell will

Colin Powell, former chairman of the Joint Chiefs of Staff and G.W.'s first secretary of state, is scheduled to appear on Meet the Press Sunday, and GOP sources tell Politico that he'll probably endorse Barack Obama.

The general’s camp is being coy about what he might or might not say on Sunday. But some McCain advisers suspect, without being sure, that Powell will endorse Obama.

“It’s going to make a lot of news, and certainly be personally embarrassing for McCain," a McCain official said. "It comes at a time when we need momentum, and it would create momentum against us.”

One thing's for sure — if Powell does endorse Obama this weekend, it will have nothing to do with dancing to Nigerian rap at Africa Rising.