What happens when Republicans in power (in the past) vote for unfair legislative rules and then lose power

"Bost said his frustration was a long time coming. The tipping point came as lawmakers prepared to vote on a contentious plan to overhaul the state's overburdened pension system, and Democrats used a 1995 rule to block debate or amendments. Bost, from Murphysboro in southern Illinois, erupted."

"He acknowledged voting in 1995 in favor of the rule used to block debate, which was sponsored by Republicans. Bost now says he didn't fully understand it and called his vote a mistake."