I'm going to let the headlines tell the tale:

P ennsylvania Senate GOP Leadership Furious with Senator Mastriano over Proposed Election Audit
https://thefranklincountyjournal.com/2021/07/26/pennsylvania-senate-gop-leadership-furious-with-senator-mastriano-over-proposed-election-audit/
Pa. senator’s plan to issue election subpoenas ‘stopped’

UPDATED WITH OAN VIDEO: Pennsylvania GOP Senate Leader Jake Corman Is Preventing Sen. Doug Mastriano from Issuing Subpoenas for Forensic Audit

(VIDEO) PA State Rep Rob Kauffman: “CALL SENATOR CORMAN’S OFFICE – We Want To Make Sure He’s On Board”

BREAKI NG: PA Senate President Corman Has FIRED State Sen. Doug Mastriano’s Staff To Prevent a Forensic Audit

Senator Mastriano Gives Stunning Update On PA Subpoenas (Video)

PA GOP Senator Holding Up Election Audit Changes Tune (Video)