What's the Tea Parties Problem?

The Tea Party has now set its sights on Congressman Mike Castle of Delaware as their next republican in their sights. Do they not understand that Castle is a shoo-in he was a popular two-term Governor and has easily been elected and re-elected to the House ever since in an at-large seat. Mike Castle is a good long serving republican and he is a Yankee republican so what. He is the type of republican that can make the party competitive again in the Northeast which they are now not. If the Tea Party knocks off Rep. Castle then the democrats will keep the Senate seat once held by Vice President Biden if republicans want to take control of the U.S. Senate Castle has to be the nominee.