The blow up marks the end of an alliance between the president and the billionaire that lasted far longer than many observers expected.

Elon Musk just launched a war against the GOP. Now the party’s hopes of holding onto power are at stake. Musk has gone from helping Republicans take total control of Washington — spending nearly $300 million to become the single biggest known donor last year — to attacking the highest-ranking leaders of the party and daring the rank and file to cross him.