Sen. Lisa Murkowski (R-Alaska) is tied with Republican nominee Joe Miller in Alaska's Senate race, and, in good news for the incumbent, 93 percent of voters who favor Murkowski said they know the procedure for voting for a write-in candidate.

A CNN-Time-Opinion Research Poll of likely voters showed Murkowski and Miller both receiving 37 percent of the vote. After Miller defeated Murkowski in the August GOP primary, Murkowski decided to run as a write-in candidate. Her campaign has embarked on an extensive voter-education campaign, and the poll shows that appears to be paying off.

The poll also examined three other competitive Senate races, and Republicans had imposing leads in all of them.

In Arkansas, Democratic Sen. Blanche Lincoln appears to be in serious trouble — trailing GOP nominee John Boozman by 14 points, 41 percent to 55 percent.

Marco Rubio (R) continues to maintain his strong lead in Florida’s Senate race. Rubio leads Gov. Charlie Crist (I) by 14 points and Rep. Kendrick Meek (D) by 26 points.

Following a similar trend, Ohio’s Republican candidate Rob Portman leads Democrat Lee Fisher 55 percent to 40 percent.

Republicans need 10 seats to win control of the Senate.

The poll conducted between October 15-18 has a margin of error of 3.5 percentage points in Arkansas, Florida and Ohio and a margin of error of 3 percent in Alaska.