Democratic lawmakers will call on President Trump to apologize for accusing former President Obama of wiretapping if he does not provide evidence of the explosive claim, Rep. Jackie Speier (D-Calif.) said Tuesday.

"The long term play is that we will call upon the president to recant and to apologize to former President Obama," Speier said on CNN's "New Day." "I mean, you do not make those kinds of allegations — criminal allegations — against a former president, as he did, so recklessly.

"It's that reckless behavior that the American people are going to start to wonder whether or not he is capable of doing the job."

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Speier did not say how the Democrats would actually get the president to apologize for the allegations, but insisted that Democrats would "take action calling on him to recant and to apologize."

Trump stirred controversy last week after he alleged on Twitter that Obama had ordered surveillance on Trump Tower during last year's presidential race.

The president provided no evidence for his claims, and the Justice Department on Monday asked for more time to respond to a House Intelligence Committee request to provide information on such surveillance against Trump and his associates.