Data for Progress polls perform really well in the national average. In the last major election, the 2022 midterms, their polls actually ended up overestimating Republicans.
https://www.dataforprogress.org/blog/2022/12/2/dfp-2022-polling-accuracy-report
"Looking at the polls in the general election cycle, our polling margin bias was 1.9 percentage points toward overestimating Republican vote share."