9) Timothy McVeigh (11)
He shouldn’t be on the list. In the grand scheme of history he did very little and it didn’t have a lasting national effect.
He gave Clinton a second term. As to "lasting effect" let's wait and see what things look like after our first war with the MIRV'ed and W-88-armed Chinese. They stole the W-88 with Clinton's help during his second term, the one he purchased with their reptile money.