Colorado Senate Democrats are calling for the resignation of Republican Sen. Randy Baumgardner.

KUNC reports a former legislative aide says Baumgardner, who represents Hot Sulfur Springs, slapped and grabbed her buttocks multiple times in 2016. The Employers Council, an outside legal firm, wrapped up an investigation into the allegation earlier this month. The group found the claim credible, according to KUNC.

In a statement, Senate Democrats say Republican leaders have delayed and rebuffed efforts to punish Baumgardner.

The Democratic caucus called for Baumgardner to step down. In the meantime, they want Senate leaders to strip him of his committee chairmanships.

Read more at Colorado Public Radio.