I’d say the biggest negative is lying to voters. Therefore, both Mitt and Rick have the biggest negatives.
Lying to voters????
“As long as I am Speaker of this House, no gun control legislation is going to move in committee or on the floor of this House and there will be no further erosion of their rights.” - Newt Gingrich
Gun Owners of America: Newt Ain’t Great on 2nd Amendment Rights, Broke His Promise to America