It's really not Republicans and Democrats I keep track of. I know how they'll vote. It's independents that decide election. As for vaccinations, I haven't seen or haven't paid any attention to the percentages via party.
What I'm interested in is actions that could influence independents as Gallup puts their percentage at 43% of the electorate as of 21 July 2021. Which that 43% can be broke down into independents lean Republican 15, lean Democratic 18, true or pure independents with no leans, 10, total 43%. No figures for August yet.
What this means is Democrats counting independent lean Democratic make up 45% of the electorate vs. the Republicans along with independents lean Republican at 41%
Keep in mind those who identify themselves with either major party vote for their party's candidates on average 92% of the time. while independents who lean toward one party or the other will vote for the party they lean toward 73% of the time on average.
The bad news since last month is independents are now stating they'll vote for the Republican candidate for the House,40%, for the Democratic candidate 35%, rest are undecided/not sure. Although I don't put much stock in the generic congressional polls. It's the best I have to go on until redistricting occurs.
