Senate Minority Leader Chuck Schumer, D-N.Y., said President Trump's tweet Tuesday morning about Sen. Kirsten Gillibrand saying she would "do anything" for campaign contributions was "nasty [and] unbecoming of a president."

"That tweet was nasty, unbecoming of a president," Schumer said during the Senate Democrats' weekly press conference.

"Sen. Gillibrand is an outstanding member of the Senate," Schumer said. "The president needs to cut it out with the tweeting. He ought to stop tweeting and start leading."

The Senate Democratic leader declined to weigh in and say whether he supports an investigation into the claims of sexual misconduct against the president, which has been pushed by Gillibrand and other Senate Democratic lawmakers in recent days.

"A whole number of my colleagues have made comments on these allegations and the president. I'm going to let their words speak for themselves," Schumer said. "I'm not going to add anything today on that subject."

Schumer also declined to say whether he would join in with some of his colleagues and call for the president's resignation.

Earlier in the day, Gillibrand called Trump's tweet a "sexist smear" against her, in which some of her Senate Democratic colleagues insinuated as a claim that Gillibrand offered sexual favors to Trump for campaign donations when Trump frequently donated to Democratic lawmakers.