Musk made a vow to vote Republican and no longer back Democrats in a message that became his latest to dominate the social media platform he hopes to soon own.
Musk lambasted Democrats as the "party of division and hate", the latest in a string of attacks the billionaire has made against the political left.
Musk said in an appearance at a tech conference on Tuesday that he would vote Republican in the upcoming election, but it was not clear which election he was referring to.
Wednesday's tweet got a lot of attention, amassing around 75,000 retweets and more than 200,000 likes in about an hour.
I can no longer support them and will vote Republican.
If his deal to buy the company goes through, Musk promises to make it a bastion of free speech, which would upset the far right and the far left. Musk claims that the company has an extreme left-wing bias and that it has been used to silence conservative voices on the platform. Musk last week said he plans to lift Trump's ban that began shortly after the Capitol riot, which he called a "flat-out stupid" decision, but Trump responded by saying he intends to stay on his own social media platform.
Musk has donated to numerous Republican candidates and organizations in the past, even though he has never voted for the GOP. The beneficiaries of Musk's past political donations include House Minority Leader Kevin McCarthy and Sen. John Cornyn.
Musk said last week that he was putting his deal to buy the social network on hold because it had failed to back up its claim that less than 5% of accounts were fake. The deal to buy the company from Musk will fall apart as investors worry. The share price in Musk's offer is 32% below the current price. The board of the company said Tuesday it still expects to close the transaction and enforce the merger agreement.
How Musk Already Owns a Social Media Website: The 8 top posts in the past week.
Musk said he would lift the ban on Trump.
Musk says the deal is on hold.
Donald Trump says he won't come back to social media.