More and more Republicans are stepping up in this election — to endorse Barack Obama.

Sunday the man who might just be the most respected living Republican in America — former Secretary of State Colin Powell — said he was supporting Obama.

Of course the Fat Man, legend-in-his-own-mind Rush Limbaugh, couldn’t wait till his Monday air time to try and denigrate Powell.

“Secretary Powell says his endorsement is not about race,” Limbaugh wrote in an e-mail to Politico’s Jonathan Martin. “OK, fine. I am now researching his past endorsements to see if I can find all the inexperienced, very liberal, white candidates he has endorsed. I’ll let you know what I come up with.”

Of course in Limbaugh’s world, black men only endorse other black men because of race. Otherwise they’d know their place and support their betters, Republicans who create jobs for them and take care of them.

It’s understandable if Rush is a little desperate these days. He’s losing his audience and losing his relevance, and the rumors about his personal life are becoming more and more unpleasant.

So with news events like Powell endorsing Obama, all he can do is be outrageous.

That’s all right, though.

Nobody listens to him anymore except the true believers.