What happens if a president in U.S.A breaks the law?

What happens if a president in U.S.A breaks the law?
There should be enough protection in place to make sure he does not. On the other hand and depending on the severity of the case, he could be impeached. Accused before an appropriate tribunal of misconduct in office. He may be impeached by the House of Representatives, The articles of impeachment once approved by a simple majority are then submitted to the Senate, the Senate then holds a trial and and each member voted for or against a conviction. Two thirds must approve. Once convicted a President can be removed from office for high crimes and misdemeanours, impeachment can also occure for misconduct that is not necessarily criminal, as a violation of the Constitution.

Several Presidents have been impeached. Andrew Johnson after the civil war, but was aquitted. Richard Nixon resigned from office before impeachment. William Clinton was impeached in 1998 but was aquitted the following year.