The pivotal primaries in Alabama and Mississippi come as a new poll appears to prove just how non-progressive some GOP voters in the region are.
An astonishing 29 per cent of Republican voters in Mississippi believe that interracial marriage should be illegal.
This number falls to a still significant 21 per cent among self-declared GOP supporters in Alabama, according to the survey by Public Police Polling.
In Mississippi, 54 per cent said they were in favour of mixed-race marriage, a figure that increased to 67 per cent in Alabama.
Interracial marriage has been legal across the U.S. since June 1967, when a Supreme Court ruling banned anti-miscegenation laws then enforced in 16 states.
Today’s closely-forced primaries in Alabama and Mississippi offer Mr Romney a key opportunity in a region that has been slow to embrace him.