In their attempt to consolidate legislative power, autocrats can change electoral laws so that they are conducive to building majorities. For example, in electoral systems that favor proportional representation (PR), captive legislatures can pass laws favoring larger parties. They can institute thresholds to limit which parties gain representation in the legislature, thus restricting the number of smaller parties and making it easier for the ruling party to maintain or gain a majority. They can also change an electoral system from being PR to being majoritarian, with single-member winner-take-all districts like in the United States. Autocrats can also gerrymander districts to their advantage.