I think historically that has been true, but Harris/Democrats are finally beginning to be polled with higher favorables than Trump/Republicans on economic issues, so it remains to be seen what the outcome will be on this particular election. Not sure if that will be a one-off for this particular election, or if people will finally start to recognize what almost all non-partisan economic data has shown over the last few decades, which is that the economy prospers more so under Democratic presidential administrations than it does under Republican ones.