Blinken appeared before the House Foreign Affairs Committee, capping a long period of animosity between his agency and the committee's Republican leadership, which has accused the top US diplomat of ignoring its numerous subpoenas.
Musk's wealth, largely based on the share price of Tesla and the valuation of SpaceX, already took a huge leap after Donald Trump won last month's US presidential election.
As part of the agreement, the Lebanese army and United Nations peacekeepers will deploy in southern Lebanon as the Israeli army withdraws over a period of 60 days.
Musk and Ramaswamy have said they can identify billions of dollars of cuts in spending, sparking questions about whether Republicans will even try to slash politically popular social security programs.