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

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.

President-elect Donald Trump and Elon Musk have big ambitions for making the federal government leaner and more efficient by reviewing its budget and operations from top to bottom.