Appropriation bills are like any other bill [0] and go through the same process, they can be vetoed by the President and that veto can only be overruled by a 2/

Appropriation bills are like any other bill [0] and go through the same process, they can be vetoed by the President and that veto can only be overruled by a 2/3rds majority of the Senate. [0] With minor exceptions, ie they have to originate in the House because that is the body with the power of the purse.