Sen. Steve Daines (R-Mont.) is calling on Greg Gianforte, a GOP House candidate in Montana, to apologize after Gianforte allegedly assaulted a reporter on Wednesday night.

"Greg Gianforte needs to apologize," Daines said on Twitter.

Greg Gianforte needs to apologize. — Steve Daines (@SteveDaines) May 25, 2017

Daines has campaigned for Gianforte, who is running for the state's only House seat in a special election Thursday.

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GOP Sen. Jeff Flake Jeffrey (Jeff) Lane FlakeRepublican former Michigan governor says he's voting for Biden Maybe they just don't like cowboys: The president is successful, some just don't like his style Bush endorsing Biden? Don't hold your breath MORE (Ariz.) also told reporters during a press conference on Thursday that he doesn't think "there's ever any excuse to throw down a reporter."

Ben Jacobs, a political reporter for The Guardian, tweeted shortly after 7 p.m. on Wednesday that Gianforte "body slammed" him and broke his glasses.

Reporters at the scene also tweeted out their accounts of what they witnessed. A Fox News reporter later wrote that she and her colleagues saw Gianforte grab Jacobs by the neck and slam him to the ground. Republican outside groups have largely remained silent over the incident.

A spokesman for Gianforte offered a different telling of events, saying in a statement that Jacobs "entered the office without permission, aggressively shoved a recorder in Greg's face and began asking badgering questions."

"Greg then attempted to grab the phone that was pushed in his face. Jacobs grabbed Greg's wrist, and spun away from Greg, pushing them both to the ground. It's unfortunate that this aggressive behavior from a liberal journalist created this scene at our campaign volunteer BBQ," the statement said.