(CNN) – For their decision to remain in the 2012 presidential election, Mitt Romney supporter Donald Trump called the other Republican candidates "disgraceful."
The real estate mogul said it is time for Republicans to unite around the eventual nominee Romney to avoid aiding President Barack Obama's re-election.
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"If they're good Republicans they're going to say, 'Look, we've got to beat Obama, lets get together,'" Trump said Monday on Fox News. "Somebody has to get together and end this thing because now it's getting tiresome and people are not liking it. The only one liking it is Obama."
Trump, who flirted with his own presidential bid earlier in the year, pushed back against recent Santorum wins.
"He's not winning … he's not going to win and it's just not going to happen," Trump said, after pointing to his 2006 Pennsylvania Senate loss. "At a certain point you have to get behind a person and you have to start going after Obama, not each other. And what Republicans are doing is disgraceful."
He acknowledged the energizing component of a primary battle but said the process should end now.
"Romney's going to win, and I think it's now time for us to focus on Obama, which we're not doing," Trump said.