While specifics remain undecided, Trump and Musk have been in talks about how Musk could offer "formal input" on issues such as the border, the economy, and combatting voter fraud.
Those comments sent shock waves through Europe, where some leaders are preparing for a time when the US does not play the pivotal role in NATO that it does now.
The appeals court has established an expedited timetable for Trump to petition the Supreme Court to block the immunity ruling, granting him until Monday to submit an emergency stay request.
Media reports confirm that Trump's federal trial on charges of conspiring to overturn the 2020 election, initially scheduled for March 4, is no longer on the district court's calendar
It deals a significant setback to his rival Nikki Haley, bringing Trump closer to clinching his party's nomination and setting the stage for a historic 2020 rematch with incumbent President Joe Biden.
Significantly, Trump secured his position as the Republican presidential candidate in his quest to return to the White House, whereas Ramaswamy withdrew from the race after finishing a distant fourth in Iowa.