“Polling taken this early rarely reflects the final outcome of the election,” Graham spokeswoman Brittany Bramell said in a statement. “Senator Graham is focused on outlining real solutions to the issues facing voters and describing how to best secure our nation against radical Islamic terrorism, not polls.”

Graham told CQ Roll Call earlier this month that he was focused on New Hampshire, where McCain won in the 2008 Republican primary (but lost in the general to then-Sen. Barack Obama, D-Ill.), with an emphasis on Graham’s “qualifications for being commander” and a bipartisan approach to solving problems.

“It’s the early state primaries that are the way forward for me, not national polling,” Graham told CQ Roll Call at the time.

Another explanation is that the benefits outweigh the cost, as long as there’s still money in the campaign coffers.