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North Carolina’s congressional maps were likely designed as “extreme partisan gerrymanders” and must be redrawn before the 2020 election, a panel of three state judges ruled Monday.

The ruling comes in response to a lawsuit brought by Eric Holder’s group seeking to end gerrymandering. The group challenged maps the Republican state legislature had drawn in 2016, arguing that it was an illegal partisan gerrymander.

The judges did not set a deadline for the new maps, but the state will have to rush to implement new district lines before next year’s elections.

BIG breaking news just now: North Carolina must redraw its maps for our 13 US House seats before the 2020 elections, a state court ruled. #ncpol #ncga It's a win for Democrats; the lawsuit was brought by former AG Eric Holder's @DemRedistrict group https://t.co/vv5Zi1LJxt — Will Doran (@will_doran) October 28, 2019

While the US Supreme Court ruled earlier this year that partisan gerrymandering is not unconstitutional, state constitutions can still prohibit the practice. There was ample evidence of a politically motivated gerrymander by North Carolina Republicans, the judges found. The papers of the late Thomas Hofeller—a leading GOP redistricting expert who helped draw North Carolina’s map—created a “detailed record of both the partisan intent and the intended partisan effects of the 2016 congressional districts.” (Hofeller’s estranged daughter provided the documents after his death.)

BREAKING: North Carolina state court BLOCKS the state's congressional districts from being used in 2020 because of illegal partisan gerrymandering under the state constitution!https://t.co/XQa1OwtF5M — Common Cause (@CommonCause) October 28, 2019

Earlier this year, the same panel of judges threw out the maps the North Carolina General Assembly drew to elect state legislators. The panel approved new state-level maps. The judicial order for new 2020 maps for Congressional seats “respectfully urges” legislators to create “new legislative districts in a short amount of time in a transparent and bipartisan manner.”