US rivals close in on Super Tuesday

Rivals Mitt Romney and Rick Santorum made their final pitch for support in the battleground US state of Ohio yesterday, the day before 10 states hold Super Tuesday nominating contests that could be pivotal in an unpredictable Republican presidential race. Romney has been gaining on Santorum in Ohio polls all week, erasing a double-digit lead for the former senator from Pennsylvania. Ohio is the largest battleground and most closely watched prize of the 10 contests on Super Tuesday, the biggest day of voting in the Republican race to find a challenger to President Barack Obama in the November election.