Uh Excuse me but you can thank the third party voters for the 80's-90's GOP takeover. There are plenty of voters who will vote conservative even within the Democratic Party. So who had the brains to unite this force and bring about the Conservative takeover? Three names. Howard Phillips {Founder of the Constitution Party}, Paul Weyrich of Free Congress Foundation, and a Dem I'll let you guess the name LOL. They persons were the driving force behind the most successful Conservative Grass Roots movement in modern U.S. history.
GOP leadership has ignored the conservative base not just in the GOP but also the Democratic and Third Parties which is what Conservative landslide wins are made of. The GOP did not come to power on Liberalism it won on Conservatism by uniting voters from all three places. Dem's don't want GOP liberals they'll vote for their own. If the GOP doesn't give Dem Conservatives a conservative candidate they vote straight ticket. Why should they vote for the other party's liberal?
The Republican takeover was the result of, duh, people voting Republican.