Fitzgerald, however, noted that they both just met with the governor last week. And on Wednesday, Fitzgerald sent a letter to rank-and-file Assembly members from both parties asking them to contact his office directly about any bills that have passed the Assembly but not the Senate to talk about legislative priorities.

“We’re just in different spots. I don’t hold him in some negative light because he can’t get stuff done,” Vos said Tuesday. “I hope he doesn’t hold me in some negative light because our members want to get stuff accomplished.”

There’s so much tension between Vos and Fitzgerald that longtime observers say that, were they charged now with passing Walker’s controversial 2011 measure to all but end collective bargaining for public workers, known as Act 10, they wouldn’t be able to get it done. Fitzgerald helped lead that effort with his brother Jeff, who was Assembly speaker at the time.

Numerous lobbyists, Capitol staffers, and lawmakers from both parties — all of whom asked that their names not be used to avoid angering Republican leaders — said those in and around the statehouse are aware of the push-and-pull between the two lawmakers. They said frustration is growing because a number of bills have been caught up in the tussle and may not pass this session as a result.