How should a corporate board respond to a CEO publicly insulting and shaming a sitting president? It’s not a question that most need to consider, since few chief executives dare to directly criticize the White House.

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.

WASHINGTON, June 6 (Reuters) - U.S. President Donald Trump said on Friday that he has no plans to speak with Elon Musk, signaling the president and his former ally might not resolve their feud over a sweeping tax-cut bill any time soon.

Milan Kovac said he was leaving to spend more time with family abroad and that his exit "has absolutely nothing to do with anything else," calling support for CEO Elon Musk "ironclad."

"The easiest way to save money in our Budget … is to terminate Elon's Governmental Subsidies and Contracts," Trump said in a post.

Donald Trump and Elon Musk's bromance imploded on Thursday for everyone to see. It was gold for late-night hosts like Stephen Colbert.

Elon Musk’s escalating feud with President Trump could have serious financial fallout for the tech billionaire’s companies. Tesla stock has already taken a hit, and now investors are warning that SpaceX’s valuation may also be at risk due to Musk’s behavior.