At the White House a vital piece of legislation reaches President Johnson's desk. It's the 25th Constitutional Amendment, providing for the replacement of any disabled President or the filling of any Vice Presidency vacancy. The President points out that 16 times the U.S. has been without a Vice President. President Johnson signs into law; Article II of the US Constitution Exterior shot of the White House on a wintery day. CU President Johnson looking down at the new piece of legislation. Among the men standing behind the President is the Vice President Hubert Humphrey. CU President Johnson signing the 25th Constitutional Amendment, Article II. The man sitting next to the President could be Dean Rusk.