Probably Pennsylvania. The democrat courts in Philly have decided to add days to count votes, eliminate a requirement for signatures to match or for postmarks to matter, and to embargo poll watchers from the ballot counting. The fix IS in there.
The Democrats’ emphasis on Pennsylvania is more than gaining electoral votes; Michigan and Wisconsin, maybe Minnesota, Maine. and New Hampshire are in play. I believe that the Chinese government, in alliance with the tech giants and Wall Street, have a backup plan. If you look at a U.S. map, there is a glaring gap in the solidly blue Northeast and Mid-Atlantic: Pennsylvania. The backup plan is secession of the blue states: the states north of North Carolina and the three West Coast states. plus Nevada and Hawaii. If these states choose to recognize Biden as the duly elected President, then they can form a parallel Union, and hold the power base of Washington, DC. The western counties of PA and VA. MD as well, may secede from their respective states, but all a secessionist government needs to do is control the I-95 corridor. I-81 is too deep in the Appalachian foothills to control. The parallel government need to control the I-5 corridor on the West Coast.