Democrats have a small advantage over Republicans in battleground House districts, according to a new poll released Tuesday.

The Washington Post-Schar School poll shows 50 percent of likely voters support the Democratic candidate in their district and 47 percent back the Republican. Support for the Democratic candidate remained unchanged from an Oct. 5 poll, while Republican support ticked up one point.

Republican and Democratic candidates are running neck-and-neck in 48 congressional districts won by President Trump in 2016. Democrats lead in 21 competitive districts won by Hillary Clinton in the last presidential election. Republicans represent 63 of the 69 House districts.

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Democrats need to gain 23 seats in the November midterm elections to regain control of the House.

The poll noted that the partisan battle over Supreme Court Justice Brett Kavanaugh’s confirmation has energized both Republican and Democratic voters. About six in 10 voters say they are more motivated to vote in November as a result.

The poll, which surveyed 1,269 likely voters, was conducted Oct. 15-21. It has a margin of error of plus or minus 3 percentage points.