It's the purity you see. Most would rather back a pure also ran than vote for someone who can actually get a few more votes.
After all, it does not matter who sits in the senate, rather the principles, because that is what writes and enacts legistation. Laws we must live by, or die bucking.
You mean laws like McCain-Finegold that gave the dems the electoral advantage? Or how about McCain-Kennedy that gave us open borders and a checkered flag to the illegals? You mean those kind of laws?