Sen. Kirsten Gillibrand, D-N.Y., said Tuesday that President Trump’s tweet claiming that she would do “anything” for campaign contributions was a “sexist smear” against her.

“It was a sexist smear attempting to silence my voice, and I will not be silenced on this issue, neither will the women who stood up against the president on this issue yesterday,” Gillibrand said at a press conference.

“Neither will the millions of women who have been marching since the women’s march to stand up against policy they do not agree with,” she continued.

The New York Democrat also reiterated her calls for an investigation into the accusations against Trump of improper sexual conduct.

“It’s the right thing to do,” Gillibrand said. "These allegations should be investigated. They should be investigated thoroughly. That is the right thing to do and I'm urging them to do that, as should their constituents."

Related: Kirsten Gillibrand fires back at Trump

"Lightweight Senator Kirsten Gillibrand, a total flunky for Chuck Schumer and someone who would come to my office 'begging' for campaign contributions not so long ago (and would do anything for them), is now in the ring fighting against Trump," Trump tweeted.

MSNBC host Mika Brzezinski was among those who construed Trump's tweet to mean Gillibrand had offered sexual favors in exchange for campaign donations.

"Let's just say it," she said on-air Tuesday morning. "He's suggesting that Kirsten Gillibrand would have sex with him in order to get campaign contributions. The president actually tweeted that this morning."

Gillibrand is one of a handful of Democrats who have called for Trump to resign over the allegations.