Bush 41, no one else, lost the election when he abandoned the conservative base and reached across the aisle and worked with Democrats to raise taxes and sign gun control.
The good news is that even Republicans are capable of learning. Since Bush 41's blunder and handing over the presidency to an Arkansas grifter, it's almost unheard of for a Republican candidate to espouse raising taxes or signing gun control.
In November of this year the Republican leadership will most likely learn some new lessons.
Except his son, George W. Bush promised to sign the AWB if it hit his desk.