With time running short before Election Day, the presidential campaigns appeared to be fine-tuning their map of the states where they're campaigning the hardest.

A senior Republican official, speaking on the condition of anonymity to disclose private deliberations, said Sunday that the Romney team was seriously discussing sending Mitt Romney, running mate Paul Ryan or both to Minnesota during the final week.

The state hasn't gone Republican in the presidential race since 1972, but recent polling shows a tighter race there than most anticipated.