You know I pride myself in being the fact-checker of this board, So I have to make a few things clear after reading the article you cited.
First if you notice the headline "Democrats Are a Little Too Excited About Those Oklahoma Special Election Wins
They won seats vacated by two Republicans accused of alleged sex crimes and impropriety, for starters. Apparently they won against lackluster Republicans, not against the scandal-plagues two, who hd actually resigned their seats.
Second, although you hint at it, Shortey was charged with solicitation of a minor (his pup was 17).
I do agree with the general gist of the article. This probably does not mean Oklahoma is turning purple or the Democratic party i on the resurge nationally. It also shows that sexual misconduct crosses party lines.