Sen. Tammy Baldwin, D-Wis., has widened her lead to 10 percentage points over Republican challenger Leah Vukmir among likely voters in the 2018 midterm elections for Baldwin’s Senate seat, a new poll says.

Baldwin, who is seeking her second term in the Senate, has support from 53 percent among likely voters, according to the poll conducted by Marquette Law School. Meanwhile, Vukmir has support from 43 percent of likely voters.

Additionally, 3 percent reported that they do not have a preference for either Baldwin or Vukmir.

The poll shows similar numbers to Marquette Law School’s September poll, which revealed that Baldwin had secured support from 53 percent of likely voters and Vukmir had 43 percent support among likely voters.

The margin between the two candidates wasn’t always so distinct. Marquette Law School’s August poll showed Baldwin only had a 2-percentage-point lead over Vukmir among likely voters.

The poll was conducted via phone from Oct. 3-7 with a sample size of 1,000 registered voters, 799 of which were likely voters. The margin of error for all registered voters is plus or minus 3.9 percentage points, while the margin of error for likely voters is plus or minus 3.9 percentage points.