Election 2012

Trump Promises 'Very Big' Political Bombshell Wednesday

Real estate magnate and Republican political figure Donald Trump told CNBC he has a major announcement to make Wednesday concerning the presidential race.

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Though he was cagey about details, Trump promised it would make an impact and indicated the announcement could come via microblogging site Twitter.

"I do have something that's very big. It's about President Obama," he said during a "Squawk Box" interview. Asked if he could provide any hints of what he might be divulging, Trump said, "No, but tomorrow you'll see."

Trump has been active since early in the campaign, once toying with running for the Republican nomination and actually leading in many polls before the race began in earnest. (Read More: )

He has been harshly critical of President Barack Obama and at the forefront of what has become known as the "birther" movement — those who believe that Obama was not born in the U.S. and thus isn't eligible to be president.

During the interview, Democratic operative and Daily Beast columnist Bob Shrum mocked Trump's claims over Obama's residency.