but none of the three GOP candidates have been charged with crimes. Considering that two-thirds of Republicans have doubts about the 2020 elections, it would be unusual if none of the three candidates supported the insurrection.
As far as dark money is concerned, I do not believe that dark money fundraising is considered a crime. Unscrupulous, but not criminal.
For a Democratic candidate to say that their opponent is a criminal will raise questions among voters. If there are no convictions for that candidate, charges along that line are likely to be considered as hyperbole as the GOP will likely say that the current immigration policy is "criminal" so I think that a wise Democrat would refrain from using the term.
As far as the three congressional elections are concerned, I believe that the 15th district is more vulnerable than the other two districts. The district splits the span between Corpus Christi and Laredo, then juts around the east side of San Antonio. The only TV markets are in the Rio Grande Valley and the far north end of the district is more than 200 miles away from the RGV. This is also the district that does not have an incumbent and probably the most conservative.