From NPR:

Republicans don’t just control much of the electoral map. In some cases, they now have the power to redraw it.

Overwhelming victories in statehouses and governors’ races across the country this week have placed the GOP in command of redrawing both congressional and legislative districts to conform with Census results. It’s a grueling and politically charged process that typically gives the party in power an inherent advantage for a decade, allowing them to preserve current strongholds or to put others in play.

Along with gains in governorships this week, Republicans picked up about 680 legislative seats — twice the number Democrats gained in their wave two years ago. For the GOP, it’s a surge that comes at the most opportune time.

“Regardless of what happens in Washington, the Democrats will not soon recover from what happened to them on a state level on Tuesday,” said Chris Jankowski, executive director of the Republican State Leadership Committee’s REDMAP project. “It was significant. It was devastating in some areas. It will take years to recover.”

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