U.S. Democratic presidential candidates Barack Obama and Hillary Clinton are making a final push for voter support on Monday, one day ahead of what could be a decisive showdown in their quest for their party's nomination.
The rival senators are looking for wins Tuesday in the delegate-rich states of Ohio and Texas. Obama has events in Texas today, while Clinton is campaigning in both Ohio and Texas. The small northeastern states of Rhode Island and Vermont also hold contests Tuesday, but they offer far fewer delegates than Ohio and Texas.
Obama has won 11 nominating contests in a row. Opinion polls released Sunday show both candidates in a tight race in Texas, while Clinton has a slight lead in Ohio. Clinton trails Obama in the number of delegates needed to win the party nomination.
In Ohio Sunday, Clinton touted her experience as a senator and former first lady, while questioning Obama's ability to handle national security issues. Making stops in Texas and Ohio, Obama said it was he, not Clinton, who had the good judgment to oppose the U.S. invasion of Iraq.
On the Republican side, Senator John McCain has a commanding lead over former Arkansas Governor Mike Huckabee, putting the veteran Arizona lawmaker on the verge of wrapping up the party's nomination.