Cate Edwards walks with her father John Edwards into the...

Cate Edwards walks with her father John Edwards into the federal courthouse in Greensboro, N.C., as the defense continues in John Edwards' campaign corruption trial. (May 14, 2012) Credit: AP

The judge overseeing the criminal trial of John Edwards will sharply curtail the testimony of a key witness for the defense as they try to prove he didn't break the law.

Edwards' lawyers had intended to call former Federal Election Commission chairman Scott Thomas as their first witness Monday morning, but prosecutors objected.

The jury left the room while Judge Catherine C. Eagles listened to his testimony.

Thomas said it was his opinion that nearly $1 million secretly used to hide Edwards' pregnant mistress as he campaigned for the White House did not qualify as campaign contributions under federal law.

The judge ruled that Thomas won't be allowed to say that in front of the jury.

Edwards has pleaded not guilty to six criminal counts related to campaign finance violations. 

U.S., Iran agree to 2-week cease fire ... Glen Cove Taco Bell getting rebrand ... Getting the most from college campus tours Credit: Newsday

Heuermann's family arrives at court for plea day for alleged Gilgo killer ... U.S., Iran agree to 2-week cease fire ... Getting the most from college campus tours ... Picture This: Building the LIE

U.S., Iran agree to 2-week cease fire ... Glen Cove Taco Bell getting rebrand ... Getting the most from college campus tours Credit: Newsday

Heuermann's family arrives at court for plea day for alleged Gilgo killer ... U.S., Iran agree to 2-week cease fire ... Getting the most from college campus tours ... Picture This: Building the LIE

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