Lawmakers are beginning to frame their ability to prevent new maps from passing during one special legislative session as a victory. But Republicans are poised to call another.

Democrats in the Indiana General Assembly are teaming up with Texas House Democrats in an attempt to block mid-decade redistricting efforts brewing in their states.

Democrats who run populous states are considering redistricting, but some of them face a hurdle: Their parties don’t have control over drawing legislative maps. Instead, the power is in the hands of independent commissions, something often left-leaning pro-democracy advocates have supported to enact fair maps that reduce gerrymandering.