Sen. Tammy Baldwin (D-Wis.) confronted her Republican colleague Sen. Marco Rubio (R-Fla.) on Wednesday for saying it was a stupid waste of time to vote on a bill that protected rights to same-sex marriage, she told CNN the following day .

Rubio made the comment within earshot of Baldwin, the first openly gay politician elected to the U.S. Senate . The Senate may take up a bill to codify same-sex marriage protections, which could be under threat by the conservative Supreme Court that recently overturned the right to an abortion.

The two senators then rode the elevator together, where Baldwin explained to Rubio how wrong he was.

You probably would have loved to be on the elevator to see the exchange after, Baldwin told CNN of her encounter with Rubio.

I said that, The recent Supreme Court decision eroded a constitutional right to privacy. Theres a whole bunch of cases that have been decided based on a constitutional right to privacy that are in jeopardy, which he disagrees with, she continued. And anyways, I said well be talking some more.

While Baldwin kept Rubios private response secret, she said she was counting votes for when the bill eventually heads to the Senate floor. She predicted Democrats would have 10 Republican votes in order to overcome a filibuster and pass the legislation.

Rubios office did not immediately respond to a request for comment on the conversation.