Elon Musk should be cautious of Trump's self-serving loyalty.

• Mark Cuban advised Elon Musk against aligning with Donald Trump, as he believed the Republican presidential candidate might not fulfill his political obligations.
• Although Cuban and Musk are at odds in the 2024 presidential race, they both aspire to hold government regulatory positions.
• In the hypothetical Republican administration, Musk has repeatedly raised his hand to lead a new "government efficiency commission," with Trump's support.
• If Vice President Kamala Harris wins the White House, Cuban, her outspoken surrogate, has indicated that he would be open to leading the SEC.

Mark Cuban advised Elon Musk not to align with Donald Trump, as the latter may not fulfill his political obligations.

"At some point, Elon, you will require assistance from Donald Trump," Cuban stated in a post to his fellow billionaire. "You will believe you have earned the privilege to request and obtain it. You have been a devoted and faithful follower of him."

When you need him the most," Cuban said, "you'll discover what many before you have learned: his loyalty lies only with himself.

In reply to Musk's earlier X post about Democrats promoting immigration into battleground states to win elections, Cuban shared his thoughts.

"If Trump is elected, this will not be the last election," Musk wrote.

In 2022, Musk openly insulted Trump on social media, but now his endorsement of Trump is a stark reversal of that stance.

Cuban's warning to Musk suggested that wealthy political supporters often seek governmental favor by aligning themselves with presidential candidates.

Despite being on opposite sides of the presidential race, both billionaires seek regulatory control.

Trump may not fulfill the exchange with Musk, according to Cuban's belief.

In recent weeks, Cuban has frequently promoted Harris as "better for business," despite some doubts about her plan to increase corporate tax rates.

As Cuban increases his public backing, he is also monitoring a possible new job prospect at the Securities and Exchange Commission.

Earlier this month, Cuban stated on CNBC's "Squawk Box" that she told her team to put her name in for the SEC, emphasizing the need for change.

Musk has expressed interest in creating a government efficiency commission to reduce federal spending if Trump is reelected and has offered to lead such an agency.

This month, Trump proposed Musk as a potential leader for the government efficiency commission, which he endorsed.

The Republican nominee suggested that Musk, a CEO of several companies, may not have the time for the job, but he could "consult."