In the final weeks of the presidential campaign, the richest man in the world has involved himself in the U.S. election in a manner unparalleled in modern history.

Elon Musk, seen over the weekend jumping for joy alongside former President Donald J. Trump at a rally in Butler, Pa., is now talking to the Republican candidate multiple times a week.

He has effectively moved his base of operations to Pennsylvania, the place that he has recently told confidants he believes is the linchpin to Mr. Trump’s re-election.

He has relentlessly promoted Mr. Trump’s candidacy to his 201 million followers on X, the social platform formerly known as Twitter that he bought for $44 billion and has used to spread conspiracy theories about the Democratic Party and to insult its candidate, Vice President Kamala Harris.

Above all, he is personally steering the actions of a super PAC that he has funded with tens of millions of dollars to turn out the vote for Mr. Trump, not just in Pennsylvania but across the country. He has even proposed taking a campaign bus tour across Pennsylvania and knocking on doors himself, in part to see how his money is being used.

Taken together, a clear picture has emerged of Mr. Musk’s battle plan as he directs his efforts to elect Mr. Trump with the same frenetic energy and exacting demands that he has honed at his companies SpaceX, Tesla and X.

Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.

Thank you for your patience while we verify access.

Already a subscriber? Log in.

Want all of The Times? Subscribe.