The Amendment process requires 2/3 vote in BOTH houses, and ratification by 3/4 of all state legislatures.
Veto override requires 2/3 vote in both houses.
Impeachment and removal requires 50% +1 in the House, and 2/3 of the Senate to convict. Certainly a high threshold, but lower than the two above.
2/3 of the senate couldn’t agree that the sky is blue.
there is zero chance of removal.