Republicans in Congress criticize Donald Trump because they want to impress Democrats and members of the media, and win praise as "solid, decent people," but President Obama's criticism of Republicans on Tuesday shows that Republicans will never get the kind of credit they seek from the left.

"One of the observations I've always made is, these establishment Republicans are always seeking the approval of Democrats. They are always seeking to be seen by Democrats as not your typical racist, sexist, bigot, homophobe Republican," Rush Limbaugh said on his radio program.

"So they go out, they say things, they do things, they propose walking across the aisle, they propose agreeing with the president on amnesty, all designed to get credit from the media and from Democrats and all that as solid, decent people. Here they are dutifully denouncing Trump, positioning themselves as supposedly above the fray, and what's the result? Obama hammers them."

He was referring to comments President Obama made earlier in the day criticizing congressional Republicans, particularly House Speaker Paul Ryan and Senate Majority Leader Mitch McConnell, for endorsing Trump despite their routine criticism of him.

"I think what's been interesting is the repeated denunciations of his statements by leading Republicans, including the speaker of the House and the Senate majority leader, and prominent republicans like John McCain," Obama said. "The question I think that they have to ask themselves is, if you are repeatedly having to say, in very strong terms, that what he has said is unacceptable, why are you still endorsing him?"

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The criticism came during a White House press conference with Obama and Singapore Prime Minister Lee Hsien Loong. Though it's unusual for a sitting president to criticize other American leaders during an event with a foreign dignitary, Limbaugh said Republicans had it coming.

"You can't please them. You can't make them love you. You can't make them say you're OK," he said of Obama and other Democrats. "It never is going to happen, and that is proof of it. I'm sure they thought that they had distinguished themselves well in their publicly stated repugnance of the nominee, Donald J. Trump. But Obama, not having any of it. Doesn't impress him."