TeslaTSLA tumbled early Monday as CEO Elon Musk doubles down on politics, vowing to form a new America Party.Musk's political move followed President Donald Trump signing into law his huge ...

Tesla investors faced a rough start to the week, with shares dropping after Chief Executive Elon Musk's plan for a new U.S. political party drew the ire of President Donald Trump - and one downgrade.

Elon Musk has officially launched a new political movement, the "America Party," following the repeal of the $7,500 federal ...