Gingrich actually undermines his credibility by blaming this all on the Democrats. The GOP had two years to fix this problem themselves and simply refused to do so. They are — AND ALWAYS HAVE BEEN — just as complicit as the Democrats are.
Except, it isn't all Republicans, either. It has been the establishment types which include nearly all Democrats and a lot of Republicans.
Their have been enough of the Republican RINOs to keep the party from being effective with President Trump, for two years.