RALEIGH, N.C. — North Carolina Democratic Senate candidate Cal Cunningham is bypassing uncomfortable questions about his extramarital activities in the final days of his closely contested race with GOP Sen. Thom Tillis. 

Whether his strategy alters the outcome of what's now the most expensive U.S. Senate race in history will depend on whether swing voters are set on removing Tillis — and potentially ending GOP control of the chamber — even if it means a replacement facing a sex scandal.