Elections and Home Prices: a Historical Perspective.
In the last 100 years, home prices have dropped for the year after a presidential election only twice:
Following the election of 1932: in the midst of the Great Depression
Following the election of 2008: in the midst of the Great Recession
In all other elections, prices appreciated in the next year.
Of course, there’s no way to know if prices would have fared even better if the other candidate won, but elections have not caused prices to drop in the next year during the 100 years for which we have data.