"The President, Vice President and all civil Officers of the United States, shall be removed from Office on Impeachment for, and Conviction of, Treason, Bribery, or other high Crimes and Misdemeanors. "
Article II Section 4 of the Constitution says that, if the president is convicted of Treason, Bribery, or other high Crimes and Misdemeanors, he can be removed from office. Yes, the president can be indicted and convicted, and upon conviction can be impeached. He can be removed without the courts by impeachment, and removed also for convictions. What is needed for convictions? Indictments and trials, of course. This wording is pretty plain and simple.
"The President, Vice President and all civil Officers of the United States, shall be removed from Office on Impeachment for, and Conviction of, Treason, Bribery, or other high Crimes and Misdemeanors. "
What don't you understand about this? For, and Conviction of. Pretty simple.