Yes, I do, but I NEVER provide my phone number. That's how the interminable begging for money starts. If they send a letter or a postcard, it goes right into junk mail never to be answered or even opened.
More often than not, I provide a letter/email on the critter's governmental platform, expressing my complaint/issue/opinion on the subject at hand, always expecting some sort of lame response in return -- maybe.
My current senators tend to reply almost always. My turd federal rep fails almost always. One need not wonder what I think about that, though all of them are within (allegedly) one political party.
My state rep is a damned good guy and I know I have his attention through previous encounters, even though I'm a nobody. My state senator, perhaps not so much, but my issues have been more local than with her more widespread area of concern.