Women make up approximately 51% of the state population, but just under 29% of the state Legislature. Several groups are working to change that.
Blake's resignation will lead to a special election in the district he has represented for a decade.
The lawmakers called for the appointment of a "vaccine czar" to oversee the coronavirus vaccine rollout.
The measure arises from Republican lawmakers’ strident disagreement with how Gov. Tom Wolf, a Democrat, has handled the coronavirus pandemic in Pennsylvania.
The state had certified Brewster's 69-vote victory, but Republicans refused to seat Brewster while a federal court was considering his Republican challenger's lawsuit.
Democratic state Sen. Jim Brewster beat Republican Nicole Ziccarelli by just 69 votes in the race for the 45th state Senate District seat.
Republicans blocked a Democratic incumbent from being sworn in because his GOP challenger has disputed the razor-thin results of their election.