Sen. Lindsey Graham is almost positive that he will enter the 2016 presidential race, but he will be a longshot against the other well-funded Republican nominee hopefuls, according to Fox News.

Graham told "Fox News Sunday" host Chris Wallace that there was a 91 percent chance that he would run.

Wallace replied, "Seriously?"

"Yeah, I think so," Graham said. "I've criticized the president for leading from behind, for being weak and indecisive. I've been a problem-solver in Washington, and I think I've got something to offer the party and the nation." 

Graham said he has a better foreign policy plan than Republican candidate Rand Paul and Democratic candidate Hillary Clinton.

"I think I've got a good message," he said. "I've been more right than wrong on foreign policy." 

According to the Huffington Post, Graham had been thinking of running since January when he set up an exploratory committee. 

Graham has moderate views on climate change, closing tax loopholes and immigration reform. He said he could win South Carolina, a mostly conservative and an early primary state.

"If I'm on the ballot, I'll win," Graham said.

Graham acknowledged that he will be challenged to come up with the money needed for a successful campaign. He also knows he is not among the leaders in early polling.

"If I raise the money, I'll run," Graham said

Graham faces challenges from Florida Sen. Marco Rubio who already has reported $40 million or more in financial commitments. Rubio just announced his candidacy last week. 

Super PACS for Texas Sen. Ted Cruz have also reportedly raised about $31 million in funding just one week after Cruz announced he would be running last month. Former Florida Gov. Jeb Bush likely wants to raise $100 million for his candidacy, which has not yet been announced.