Washington (CNN) President Donald Trump threatened on Saturday night to sue top congressional Democrats Rep. Adam Schiff and House Speaker Nancy Pelosi amid the House impeachment inquiry into the President.

Trump, who has a long track record of calling for lawsuits against his critics and not following through, said, "We're going to take a look at it. We're going after these people. These are bad, bad people." The President was speaking at the Values Voter Summit in Washington, DC.

Trump said he spoke to his lawyers about Schiff and told them, "Sue him anyway, even if we lose, the American public will understand." Schiff, the chairman of the House Intelligence committee, is spearheading the impeachment inquiry.

"And sue Nancy Pelosi," Trump continued. "Or maybe we should just impeach them, because they're lying and what they're doing is a terrible thing for our country." Members of Congress cannot be impeached, according to the US Constitution.

Trump condemned Schiff's characterization in a committee hearing of a White House transcript that shows Trump repeatedly pushed for Ukrainian President Volodymyr Zelensky to investigate Trump's potential 2020 political rival, former Vice President Joe Biden, and his son, Hunter, during a July 25 phone call. There is no evidence of wrongdoing by either Joe or Hunter Biden in Ukraine.

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