Mitt Romney hoped to take a big step toward the GOP presidential nomination Tuesday by increasing his delegate lead over his rivals in voting across 10 states.
Before heading to Boston to await Super Tuesday's returns, Romney addressed the American Israel Public Affairs Committee annual meeting in Washington via satellite. He also was raising campaign money in Ohio.
In the speech, Romney assailed the Obama administration's go-slow approach on Iran, saying "hope is not a foreign policy. The only thing respected by thugs and tyrants is our resolve, backed by our power and our readiness to use it."
The former Massachusetts governor spent primary eve campaigning across Ohio, where polls showed he was locked in a dead heat with Rick Santorum, the former Pennsylvania senator.
Voters were casting ballots in nine other states, including Tennessee, where the race also was close, and Georgia, which Newt Gingrich represented in Congress and where he hoped to do well.
Romney expected to do well in Massachusetts, his home state, as well as in Vermont and Idaho.
A former Massachusetts governor, Romney was confident as he spoke to Ohio voters Monday and said earning significant support Tuesday would allow him to "start organizing our effort to make sure that we replace President Obama."
Romney's team was urging Republican elders to jump on board the campaign, arguing that Romney is the only one with the focus, discipline and organization to defeat Obama in the fall.