WASHINGTON (AP) — Mitt Romney and his under-funded opponents are taking advantage of a weeklong lull in the Republican presidential nomination fight to raise the money needed to carry out Super Tuesday strategies and compete in states beyond.

Romney is the wealthiest candidate in the race with a big bank account and a personal fortune he could tap. Yet, even he is spending the bulk of this quiet campaign week largely courting donors from California to New York as he looks to ensure that he can swamp his opponents on the TV airwaves in upcoming contests.

The quest is more urgent for his top two challengers, Rick Santorum and Newt Gingrich. They must figure out how to pay for get-out-the-vote efforts and TV ads in multiple states at the same time.