Gianforte, a wealthy businessman, lost a race against Montana’s Democratic governor in November while Trump won the state by 20 points. In the congressional race, Gianforte has tried to tie himself to the president and been boosted by visits from Vice President Mike Pence and Donald Trump, Jr.

Hours before Wednesday’s assault, the Gianforte campaign sent out a last-minute fundraising appeal to its supporters, saying the outcome “will determine whether we pass Donald Trump’s America First agenda or if the fake news media and the national Democrats will win, keeping Obama’s reckless policies in place.”

Democrats were hoping an upset would send a message to the GOP that Trump’s souring approval ratings could damage their political fortunes even in deep red states.

The Democratic Congressional Campaign Committee announced that it would launch as many Facebook ads as possible about the assault, targeting Montana Democrats who might not otherwise vote Thursday. The Committee called for Gianforte to quit the race and for the Republican Party to denounce him publicly.

Requests for comment went unanswered Wednesday night from House Speaker Paul Ryan and the National Republican Congressional Committee.

Scott Sales, the Republican president of Montana’s state senate, unsuccessfully vied against Gianforte for his party’s congressional nomination. On Wednesday evening, he said he could not understand why the scuffle took place.

“There’s always two sides to a story, but this doesn’t look good,” Sales said. “It’s not what you want to see happen on the eve of an election.”

The Gianforte campaign Wednesday night released a statement blaming the incident on Jacobs. It contends he “aggressively shoved a recorder in Greg’s face and began asking badgering questions” before being asked to leave.

Gianforte asked Jacobs to lower a phone that was being used as an audio recorder, then tried to grab it, the campaign said in a statement. Jacobs then grabbed Gianforte’s wrist and both fell to the ground, Scanlon said.

The 45-second recording does not contain a request from Gianforte that Jacobs lower his phone. Acuna, the Fox News reporter, wrote that “at no point did any of us who witnessed this assault see Jacobs show any form of physical aggression toward Gianforte.”

The sheriff’s office said Gianforte has until June 7 to appear in court on the charge.

Federal records show that the sheriff donated $250 to Gianforte’s congressional campaign in March. In his statement, Gootkin confirmed the donation but said, “This contribution has nothing to do with our investigation, which is now complete.”

As a candidate, he has already had to apologize for his treatment of the press after an incident last month at a meeting of a Christian group where a man complained about reporters and said he wanted to “wring their necks.”

Gianforte pointed out a reporter covering the meeting and said, “It seems like there is more of us than there is of him,” according to the Helena Independent Record newspaper. He later said it was a joke and the reporter in the room laughed with everyone else.

The Guardian is a British liberal newspaper that opened a U.S. edition 10 years ago. Its U.S. editor, Lee Glendenning, said in a statement: “The Guardian is deeply appalled by how our reporter, Ben Jacobs, was treated in the course of doing his job as a journalist while reporting on the Montana special election. We are committed to holding power to account and we stand by Ben and our team of reporters for the questions they ask and the reporting that is produced.”

Copyright 2017 The Associated Press.  All rights reserved.