YES! 

Mobile recipients are not compelled to receive political texts, and express written consent must be obtained before they can receive ongoing messages. Under NO CIRCUMSTANCES are political organizations allowed to import numbers and begin text campaigns without vetted and verified proof of consent. 

Example of proof:

URL to the website where potential contacts encounter the mandatory disclaimer displayed in conjunction with the option to join messaging. 

Additional references on this topic can can be found on the US FCC.gov Website - FCC Political Campaign Robocall and Robotext Rules 10/22/2024