With Republicans in Texas planning to redraw more favorable congressional maps this summer, as the party vies to maintain control of Congress next year, national Democratic leaders are vowing to use every tool at their disposal to counter what they see as a nakedly partisan power grab.

But the toolbox for Democrats is relatively sparse, aside from litigation or legislative protests.

Though Democratic leaders have indicated a willingness to go tit for tat with Republicans, most of the largest blue states do not have a partisan redistricting process akin to the one in Texas, where the governor can simply call in the Legislature to redraw maps.

California has an independent commission in charge of drawing maps, which voters applied to congressional districts in 2010. New York also has a commission (though it is subject to potential legislative changes), and New Jersey’s political commission is separate from the Legislature.

States where Democrats would have complete control over any redistricting, such as Illinois and Maryland, are already gerrymandered heavily in their favor. Squeezing more Democratic seats out of those states would be a challenge.

“Democrats’ leverage is quite limited, and that’s the problem,” said Steve Israel, a former Democratic member of Congress from New York who led the Democratic Congressional Campaign Committee from 2011 to 2015. “Republicans are just more ruthless than Democrats. They play to break the rules, and Democrats play to enshrine the rules with fairer processes in places like California.”

While Democrats have their share of aggressive gerrymanders, blue states have led in embracing reforms to insulate redistricting from politics, such as creating an independent or bipartisan commission to agree on new maps.