The two men have teamed up with Trump to try to cut the size and scope of government. Here's what could stand in their way.

Republicans have secured a majority in the House of Representatives with a two-seat advantage. However, it is quite slim because some key races have yet to be called. President-elect Donald Trump's cabinet nominations have also raised concern about the possibility of seat vacancies.

Elon Musk has slept on Tesla's factory floor and instructed SpaceX employees to walk out of meetings where they aren't adding value.