Top Colorado Republican candidates running for seats in Washington have all pledged to repeal health care reform, even though practical chances of repeal are thin and the bill is growing more popular by the day. Senate candidates Ken Buck, Tom Wiens and Jane Norton have vowed to work to repeal, as has state Rep. Cory Gardner, who is running for Democrat Betsy Markey's Congressional seat. With the Tea Party activists rallied relentlessly around opposition to the bill over the course of the last 12 months, there is little room to give up the health care fight for candidates on the right in tight races, no matter how impractical.