President Donald Trump on Thursday signed an executive order to strip lawyers at WilmerHale of their security clearances,

President Donald Trump signed an executive order Thursday directing agencies to suspend the security clearances and access to federal buildings of lawyers for the law firm Wilmer Hale. The order also directs agencies to “refrain from hiring employees” of the firm without a waiver from an agency head,

The discussions come as President Trump has taken aim at Wilmer Hale, another big law firm. Other major firms are said to be trying to cut deals with the White House.

The order’s election requirements include documentary proof of citizenship and taking action to prosecute election crimes.

President Trump signed an executive order aiming to revamp U.S. elections by mandating proof of citizenship for voter registration. Arizona Secretary of State Adrian Fontes expressed concern that the order could negatively impact the voting system.

Here's what to know about Trump's executive order on elections, proof of citizenship, and why the order likely won't impact Wisconsin.