Mitt Romney on Monday said the GOP primary fight has made him a “tougher” candidate, brushing aside concerns that the long fight to win the nomination is weakening the future nominee and strengthening President Obama’s chances.

Romney called it a “rough-and-tumble process of sorting things out” that “makes us tougher” in an interview airing Monday on CNBC.

Pressed by interviewer Larry Kudlow, Romney agreed that he thinks the process has made him “tougher” as an individual candidate.