PORTLAND, Maine (AP) The most expensive political race in Maine history is drawing to a close, and voters are now getting the final say.

Mainers are deciding Tuesday whether to reelect Republican U.S. Sen. Susan Collins to a fifth term or oust her in favor of Democratic House Speaker Sara Gideon.

Collins touted herself as an experienced, bipartisan candidate who works to get things done for Maine, while Gideon drove home her message that Collins no longer represents the interest of Mainers.

Polls showed the race was close despite more than $120 million spent on television advertising. With four candidates in the race, ranked choice voting could come into play.