“I am going to stay right to the bitter end, as long as I have a chance,” Bloomberg told MSNBC in an interview scheduled to air on Friday.
Saturday's Democratic primary in South Carolina is the last of four early-voting contests in which Bloomberg does not appear on the ballot. Sen. Bernie Sanders, I-Vt., has won the previous two contests in New Hampshire and Nevada following a close second-place finish in Iowa.
Bloomberg added that he wouldn't give up at the Democratic National Convention even if Sanders garnered a plurality of pledged delegates.
"If Bernie Sanders were to get a majority, then of course not," Bloomberg clarified.
Sanders has attacked Bloomberg for allegedly buying his way into the race after other candidates had already been running for months.
"I'm running a race and I'm behind with one lap to go," Bloomberg said. "What? Am I going to quit? No, you run harder."