"Really, if anything, it makes it a two-man race," said Paul, citing his father's strong second-place showing in New Hampshire on Tuesday. "It looks like it’s Gov. Romney and Ron Paul."

Paul said his father and Romney were the only two candidates with deep enough pockets and the broad nationwide infrastructure to survive the remainder of of the grueling primary process. 

"They’re the only two candidates that have a nationwide network," he said, as reported by the Murray, Ky., Ledger & Times on Thursday. "They’re the only two candidates that have enough money."

Paul, who has spent much of the Senate's recess stumping for his father in Iowa and New Hampshire, also pointed out that some of the top-tier candidates have failed to even get their names on the ballot in critical states, further reducing their viability. 

"People like Santorum and Gingrich aren’t on the ballot in Virginia or Illinois. You can’t win if you’re not on the ballot, so it shows sort of a lack of organization," the freshman senator said. "So I think it, hopefully, comes down to a two-man race, and we can keep convincing more and more people to think about something outside the box.”

That strategy, also outlined by Paul on Thursday, mirrors comments his father made after his second-place finish in New Hampshire in which he urged all candidates besides Romney to drop out and allow voters to choose between a centrist, represented by Romney, and himself.