North Carolina legislators have started drawing the political districts that, pending any legal challenges, will be used in every election for the U.S. House of Representatives and N.C. General Assembly for the next decade.

Some early versions of maps drawn by top Republican officials Wednesday and Thursday garnered widespread attention online from observers who said the maps appeared to have been drawn to give Republican candidates a heavy advantage.

But the process is not yet over. Lawmakers are likely to draw more maps next week, and potentially into the week after that, too, depending on how quickly they settle on options they like during the post-2020 Census redraw.

In one early proposal for a new U.S. House of Representatives map, the lines split the state’s largest counties — Wake, Mecklenburg and Guilford — among three different districts each. The counties home to Wilmington, Fayetteville, Winston-Salem and Greenville were all split between two districts.