well according to gallup poll, low turnout benefit gop more, but I don’t agree with it
The type of voter that favors a Democrat usually comes out more heavily in a presidential year whereas mid-terms lean to the most civic minded who turn out to vote even when it’s not a dramatic one. These voters tend to be older and do lean GOP. Lower turnout in a mid-term traditionally favors the GOP for this reason while higher turnout means more Democrats then the norm have taken an interest in a mid term.
But this may not be an ordinary year. If the polls are accurate GOP and independent voters are energized at nearer to presidential years while Democrats are depressed. Higher turnout could mean an additional 10-30 seats for Republicans IF that anaylsis holds true. My hope is that it is true. If it is true, a seat like the Senate one in WV will flip to Raese and not Manchin.