David Wasserman

David Wasserman is with the Cook Political Report, which ranks the competitive and partisan leaning of political districts.

He says the efforts in states across the country to create more safe seats for their respective parties has led to a situation where there are fewer seats that will be competitive come November.

There's no doubt that this mid-decade redistricting war has diminished the ranks of competitive seats to the point where likely fewer than 5% of Americans are going to have a genuine say over who controls the House in November.

Wasserman says in Trump's first term, his group rated 48 seats as either toss-ups or leaning toward one party.

This year, though, there are just 36 of those seats.

Ashley Lopez, NPR News.