TOLEDO, Ohio (AP) -- Mitt Romney is trying to capitalize on twin victories in Arizona and Michigan as the GOP nomination race expands to the 10 states that vote on Super Tuesday.
Rival Rick Santorum narrowly lost in Michigan and now faces splitting the conservative vote with Newt Gingrich as the former House speaker counts on Southern primaries to revive his campaign.
Texas congressman Ron Paul remains a factor in the GOP race as he attempts to mine delegates in caucus states like North Dakota, where his campaign team says the process plays to his strengths.
Super Tuesday is March 6, just three days after Saturday's Washington state caucuses. All four candidates face financial strains as they try to advertise in a series of expensive states in which to campaign.