A handful of Republican-held House seats in the Texas suburbs represent fertile ground for competitive races in 2020, according to recent Democratic polling.

The surveys in six GOP districts, shared first with CQ Roll Call, are a sign that Democratic outside groups are willing to spend resources in the Lone Star State, where party leaders believe they can make gains next year. The polls were commissioned by House Majority Forward, the nonprofit arm of House Majority PAC, a super PAC tied to the chamber’s Democratic leadership.

Three of the districts surveyed have GOP incumbents running for reelection, including Reps. Michael McCaul in the 10th District, Chip Roy in the 21st and John Carter in the 31st. Polls were also conducted in three open-seat races in the 22nd, 23rd and 24th districts. Republicans won all six seats in 2018, all by margins of 5 points or less.

The surveys, conducted by Public Policy Polling, tested a generic Democrat against a generic Republican in each of the districts.

Respondents backed a generic Republican candidate over a Democratic one in four of the six races. In the 10th, 21st and 22nd districts, 49 percent supported a GOP candidate, compared to 46, 44 and 45 percent respectively for a Democrat. Fifty-one percent backed a Republican in the 31st District, compared to 44 percent for a Democrat.