“In the past I voted Democrat, because they were (mostly) the kindness party. But they have become the party of division & hate, so I can no longer support them and will vote Republican,” he tweeted.

“Now, watch their dirty tricks campaign against me unfold,” said Musk, the world’s richest man, who has agreed to buy Twitter Inc TWTR.N.

The 50-year-old billionaire recently said he would reverse Twitter’s ban on former U.S. President Donald Trump, a Republican, when he buys the social media platform. He also said Twitter is far-left-biased because it is headquartered in California, a state known for its progressive politics.

Musk has been a vocal critic of the Biden administration and Democrats for their proposals to tax billionaires and give more tax incentives to union-made electric vehicles. Tesla does not have unions at its U.S. factories.

Last year, Tesla, which counts California as its biggest market in the United States, moved its headquarters from California to the more politically conservative Texas.

Musk moved his personal residence from California to Texas, where there is no state income tax. He has sold about $25 billion worth of Tesla stock since last year in order to pay taxes and finance his proposed acquisition of Twitter. Analysts said the sales helped him cash in on Tesla’s stock rally and diversify his wealth.

(Reporting by Hyunjoo Jin in San FranciscoEditing by Matthew Lewis)