When Eric Holder and Barack Obama go on vacation together, they talk about redistricting.

“We were determined to do things not political,” the former attorney general said of a recent trip with the former president in an interview with NBC News ahead of a speech to the Virginia Democratic Party last weekend. “This was the political thing that we talked about the most.”

After struggling with a heavily gerrymandered House of Representatives for most of his presidency, Obama tapped Holder to lead a new group to prepare Democrats for 2020, when states will redraw the boundaries of their legislative and congressional districts for the first time in a decade.

Read More: NBC News, June 19, 2017