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... Musk has been so aggressive in pushing his views about Trump's second term that he's stepping on the toes of Trump's transition team and may be overstaying his welcome at Mar-a-Lago, according to two people familiar with the transition who have spent time at the Palm Beach, Florida, resort over the past week.

The sources said that Musk's near-constant presence at Mar-a-Lago in the week since Election Day had begun to wear on people who've been in Trump's inner circle longer than the tech billionaire and who see him as overstepping his role in the transition. The sources spoke on condition of anonymity because they're not authorized to speak publicly.

"He's behaving as if he's a co-president and making sure everyone knows it," one of the people said of Musk. ...