Crowell & Moring, which has called for President Donald Trump’s immediate removal from office, said late Friday that 17 law firms have joined the firm in urging Vice President Mike Pence to invoke the 25th Amendment.

Crowell said the law firms, which include four Am Law 200 firms as well as midsize and smaller firms, are sending a joint letter to Pence. The letter said the firms’ attorneys had “watched in horror as the U.S. Congress was subject to a mob’s raid and occupation of the Capitol” that interrupted the orderly transition of power.