Tesla shares plunged nearly 7 percent on Monday as investors registered dismay at Mr. Musk’s plans to form a third party and his intensifying feud with President Trump.

Before we assess the eternally unrealized dream of a potent third party in American politics, let’s consider the specific, recently emergent dream of one specific man: Elon Musk.

Grok made multiple positive references to Hitler this week when queried about posts that appeared to celebrate the deaths of children in the recent Texas floods.