I don't think lack of balls is the problem.
Start to notice..... The Republicans want pretty much the same thing as the Dems Control. They will rant and rave about what the Dems are doing but only enough to get on the record as being against it. They don't want to stop it, just blame the Dems for doing what they wish to have done.
How many times have you seen the Republicans gain control of the both the House and the Senate and the Presidency and how much of what the Dems do is revered? Little if anything. Gun Control might be an exception since both of them have learned it is the middle rail.