It’s not really that easy. To become a state, a territory has to first write a constitution, get it passed in a referendum and then petition for statehood. Then it is a simple act of congress. But the process cannot happen overnight.
To get back to the main thread, the election will not be fought over gun control. Reasonable gun control (banning assault weapons is a majority position anyway). It will be on the economy. The Reps will do everything they can to prevent the economy from improving.
This means first getting Covid-19 under control. And second going deeply into debt to sustain and support the economy. It’s 1933 all over again and you need a Rooseveltian revolution, not an Obama type attempt at bipartisanship. And taking the side of Main Street, not Wall Street. There are serious problems and the Dems have to be seen to be solving them. Then the 2024 election will be like the 1936 one where they won all but two states (ME and VT, oddly enough).
If the court starts disallowing all this legislation, then the time will come for packing.