Sen. Al Franken, who on Thursday faced allegations of groping and kissing a woman without her consent, is set to appear at a fundraiser Saturday for Sen. Bill Nelson.

We've asked Nelson's team if the fundraiser, to be held at Alex Sink's home near Tampa, is still on.

UPDATE: "Sexual harassment is never acceptable. The Senate Ethics committee will fully investigate this troubling incident, as I believe they should," Nelson said in a statement.

"As for the events this weekend, Sen. Franken is no longer available. The campaign events will continue as scheduled."

A radio host, Leann Tweeden, said Franken made unwanted advances while practicing a skit for a USO tour in 2006.

"I certainly don't remember the rehearsal for the skit in the same way, but I send my sincerest apologies to Leeann," Franken said in a statement. "As to the photo, it was clearly intended to be funny but wasn't. I shouldn't have done it."

Franken, through his PAC, gave $10,000 to Nelson's 2012 campaign and another $10,000 for the upcoming run.

Republicans have demanded he return the money. Nelson hasn't yet said what he'll do.

UPDATE 2: Nelson will donate the money to charity, a spokesman said.

Note: The headline of this post was updated to reflect that Franken will no longer appear at the fundraiser.