[Thorrez]

>politicians are afraid of setting limits on cold calling because politicians themselves frequently use questionable call lists to robocall people.

I think they sometimes avoid this problem by only putting restrictions on commercial entities, not on political or charitable entities:

>In Michigan, commercial vendors are not permitted to robocall individuals without prior consent, but political campaigns and charitable organizations are exempt from any such restrictions.[1]

There does seem to be some bipartisan support for fighting spam calls.[2]

[1] https://www.michiganelectionlaw.com/political-spam-text-emai...

[2] https://techcrunch.com/2019/12/31/traced-act-signed-into-law...