Billionaire Elon Musk, coming off his endorsement of Trump after the Republican candidate survived an assassination attempt on Saturday, plans to donate about $45 million per month to a super PAC backing the former president, according to a report.

Formed last month in support of Trump with financial help from some of Musk's friends, America PAC includes Palantir Technologies co-founder Joe Lonsdale, Cameron and Tyler Winklevoss, and former U.S. ambassador to Canada Kelly Craft and her husband, Joe, the chief executive of coal producer Alliance Resource Partners, The Wall Street Journal reported.

The group has spent at least $6.6 million on behalf of Trump, who was nominated at the Republican National Convention on Monday to be the party's candidate for president.

America PAC focuses on registering voters and urging swing state residents to vote early and request mail-in ballots, according to the report. The goal is to counter Democrats' "get out the vote" campaigns and on-the-ground efforts in the months leading up to the November election.