Washington (CNN) – Republican Sen. Jim DeMint is sounding the alarm to the GOP, warning that unless the party can come together, it won't matter if Republicans regain control of Congress in November.
"If we get the majority again, even if it's just in the House, and we don't do what we say, I think the Republican Party is dead," DeMint told CNN's Candy Crowley, host of State of the Union and CNN's Chief Political Correspondent.
"The urgency for me here is the Democrat Party - and I know this sounds partisan but - are completely dysfunctional. They're the left of Europe," DeMint added, in an interview that will air Sunday on CNN's State of the Union with Candy Crowley.
A number of establishment-backed Republican candidates lost primary battles to conservative political newcomers this election cycle, as a wave of anti-Washington sentiment swept across the country. The movement has created a rift within the GOP that some predict will make governing more difficult, even if the Republicans have a majority.
DeMint has also incensed some within the Republican Party by backing conservative candidates rather than the GOP establishment's picks. He most recently endorsed Delaware Senate nominee Christine O'Donnell, who easily beat long-time Rep. Mike Castle in Tuesday's primary.
Frustration with DeMint in Republican circles boiled over following O'Donnell's win Tuesday night. One unnamed senior GOP aide told CNN's Dana Bash Tuesday night: "I wonder who Harry Reid and Chuck Schumer are calling first tonight – Chris Coons for becoming the next Senator from Delaware or Jim DeMint for helping to make it happen."
But DeMint -who has been mentioned as a 2012 presidential candidate– is taking a more conciliatory tone, telling Crowley that Republicans must unite around common causes in order to take back control.
"The Republicans are the only one who can carry the banner of what I think millions of Americans are saying - not just Republicans, Independents and Democrats - stop the spending, stop the borrowing, stop the debt, stop the takeovers. This is kind of uniting America," DeMint said.