Despite trailing significantly in South Carolina, Ohio Gov. John Kasich's campaign declared that they have made the "final four" in the GOP field, intimating that former Florida Gov. Jeb Bush should get out of the race after Saturday night.

"Tonight it became a four-person race for the nomination. Only four candidates have top-three finishes in any of the early states and can justify staying in," said chief strategist John Weaver in a statement. "At the same time, John Kasich has now won the so-called 'Governors Bracket' by continuing to run strong and beat expectations."

Weaver further dug the knife into Bush in the statement, saying that while some candidates were "making their last stand" in the Palmetto State, Kasich was focusing on Super Tuesday and states voting in early March.

"While others were making their last stand in South Carolina, John Kasich strengthened his organization and support — despite being outspent by tens of millions of dollars. He also focused on the key states ahead for us, like Michigan, where he is currently second, Massachusetts and Vermont," Weaver said.

"As the race narrows to four candidates and enters the next phase, it also turns toward states that favor the governor and make his path to the nomination increasingly clear," Weaver said.

The former McCain political hand also pointed out that Kasich only spent $882,000 in South Carolina while comparing it to Bush, who spent over $13 million in his effort.