A mob stormed the Capitol as lawmakers met to confirm President Joe Biden's poll win on 6 January last year.
Separately the Republican Party censured two of its top lawmakers for investigating the Capitol riots.
The RNC appeared to suggest rioters had been involved in legitimate political actions but RNC Chair Ronna McDaniel clarified that it was a reference to "legitimate political discourse that had nothing to do with violence at the Capitol".
The statement by the Republican National Committee (RNC) accused the pair of helping to persecute "ordinary citizens engaged in legitimate political discourse".