Vice President Biden is doubling down on watchdog groups and others who are saying he made misleading remarks in a speech earlier this week regarding the Romney-Ryan rescue plan for Medicare – daring reporters to “fact check me.”

Biden put down the challenge during a speech Saturday, after saying as he did during his acceptance speech Thursday at the Democratic National Convention that GOP presidential nominee Mitt Romney and running mate Rep. Paul Ryan’s plan would cut benefits immediately for 30 million seniors already collecting Medicare.

“I say to the press, fact check me,” a smiling Biden said to applause at a rally in Zanesville, Ohio,

The Romney Campaign took up the challenge within hours.

“Today, Vice President Biden said that he should be fact checked, and we agree,” said Romney campaign spokeswoman Amanda Henneberg. “The vice president knowingly and deliberately leveled false and discredited attacks. This is further proof that the Obama Campaign is unable and unwilling to talk honestly or substantively about the most important issues driving the country.”

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