Shares of Elon Musk’s electric vehicle maker are falling sharply Thursday as investors fear his dispute with Donald Trump could end up hurting the company.

The broken alliance between the President and world's richest man could threaten Musk's lucrative pending -- and future -- federal subsidies.

The president also asserted that Musk's days of blistering attacks on the bill were motivated by the proposed elimination of consumer tax credits for electric vehicles. Musk, the CEO of electric vehicle maker Tesla,