Barletta getting into the Senate race will probably knock out a few of the minor Republican candidates but I doubt he will have a clear field.
On the other hand the next primary election in the Pennsylvania 11th Congressional District will be a donnybrook on both sides.
The only declared candidate in the 11th CD until now was Democrat Alan Howe.
That will change in the next few days.
The Republicans have a deep bench in a district that stretches from Wyoming County to down past Harrisburg and Carlisle. There are many Republican Legislators and County officials that will be looking for a promotion.
Of course some rich guy/girl who could self finance might get in on it.
My archive/oppo research on Barletta