Ron Paul called on all Republican presidential candidates other than Mitt Romney to quit the race on Wednesday, saying he is the only candidate with the money and support to challenge Romney.

The Texas congressman finished second in the New Hampshire primary Tuesday.

“The race is becoming more clearly a two-man race between establishment candidate Mitt Romney and Ron Paul, the candidate of authentic change. That means there is only one true conservative choice,” his campaign chairman, Jesse Benton, said in a statement posted on Paul’s official website.

“Ron Paul and Mitt Romney have been shown in national polls to be the only two candidates who can defeat Barack Obama.

"And Ron Paul and Mitt Romney are the only two candidates who can run a full, national campaign, competing in state after state over the coming weeks and months,” Benton added. “Ron Paul's fundraising numbers – over $13 million this quarter – also prove he will be able to compete with Mitt Romney. No other candidate can do all of these things.

“Ron Paul is clearly the conservative alternative to Mitt Romney as the campaign goes forward.

“We urge Ron Paul’s opponents who have been unsuccessfully trying to be the conservative alternative to Mitt Romney to unite by getting out of the race and uniting behind Paul’s candidacy.”

Paul came second in New Hampshire on Tuesday with 23 percent of the vote. He trailed Romney by 16 percentage points and beat the third-placed contender Jon Huntsman by 6 points.