Trump won by 1.5% and the media acts like it was a Reagan-esque 1980 sweep. They had to gerrymander for decades and launch a massive misinformation campaign to get this outcome too. Plus Biden had to be one step into dementia and punt to unpopular Kamala (who lost her 2020 primary attempt) last minute to help this small victory. Yet everyone is acting like this is some massive referendum and America fully swung to the right. These sycophantic tech bros are showing their bellies awful quick.
Gerrymandering doesn’t directly affect presidential races, but it does affect them. States that were gerrymandered to Republican super majorities created rules to make voting harder for lots of democratic areas. They limited ballot access and purged voter roles in blue areas. It also affects the electoral college. As part of all the other tactics, it all made a difference.