“Disenfranchise”—meaning “to deprive someone of a franchise, generally their right to vote”—has nothing to do with french fries, but there are jokes. “I had to break it to my youngest that I was going to curtail her growing dependency on fast food. It’s time to disenfrenchfries her. (Jenni Saque)” was posted on the newsgroup alt.humor.puns on December 16, 2000.
 
“I’m the Reverend Al Sharpton. The New York primary is this Tuesday and states across the country have set up these new voter ID laws. But is the real purpose to disenfrenchfries you?” was said by actor Kenan Thompson (playing American civil rights activist, Baptist minister, talk show host and politician Al Sharpton) on the television show Saturday Night Live on April 9, 2016.
 
“Don’t let the government take away your favorite side dish. They’re trying to disenfrenchfries you” was posted on Reddit—3amjokes on February 11, 2020.
 
       
Wiktionary: disenfranchise
Verb
disenfranchise (third-person singular simple present disenfranchises, present participle disenfranchising, simple past and past participle disenfranchised)
1. (transitive) to deprive someone of a franchise, generally their right to vote
 
Google Groups: alt.humor.puns
New Vochadulary
Jenni Saqua
12/12/00
I had to break it to my youngest that I was going to curtail her growing holiday dependency on fast food:  it’s time to disenfrenchfries her.
       
Google Groups: alt.humor.puns
“Puns of the Weak” 12/15/00
Stan Kegel
12/16/00
(...)
I had to break it to my youngest that I was going to curtail her growing dependency on fast food.  It’s time to disenfrenchfries her. (Jenni Saque)
     
Google Groups: alt.fan.don-imus
Maher vs Imus
JunkyardBallerina
8/13/04
(...)
I bet Maher is still reeling over the vote count in Florida.
Does he know Floridians think hurricanes can read? 
Prolly those same disenfrenchfried voters.
     
Twitter
Frankie
@donkdonker
“Disenfrenchfried” is just the best word.
6:37 AM · Nov 8, 2012·Twitter Web Client
 
Twitter
Whimsical Wordsmith
@Whimsical84
I was denied the right to vote on my favorite fast food item. ー disenfrenchfried
10:12 PM · Oct 10, 2013·Twitter for iPhone
 
Twitter 
SHARK-INFESTED GHOST
@TheMain_Course
Word of the day comes from my teacher: “Disenfrenchfries”. When your ability to get fries is taken from you.
5:53 PM · Feb 25, 2016 from Anchorage, AK·Twitter for Android
   
YouTube
Politics Nation: Voter I.D. Disaster - SNL
Apr 10, 2016
Saturday Night Live
Al Sharpton (Kenan Thompson) and statistical analyst Charles Richards (Al Sharpton) rate the presidential candidates’ popularity with black voters.
“I’m the Reverend Al Sharpton. The New York primary is this Tuesday and states across the country have set up these new voter ID laws. But is the real purpose to disenfrenchfries you?”
 
Twitter
EdwinMoves
@EdwinMoves
@nbcsnl still laughing.#disenfrenchfries
11:49 PM · Apr 9, 2016·Twitter for iPhone (Posted after the above was on television.—ed.)
 
Twitter
Andrew Lam
@atllam
“but is the real purpose to disenfrenchfries people?” -The Reverend Kenan Thompson #SNL
2:50 AM · Apr 10, 2016·Tweetbot for iΟS
     
Twitter
Bey ✋🏾💙🤚🏾 2020
@Charvettebey
Lawd, #SNL did @TheRevAl @PoliticsNation on voter ID laws made to “disenfrenchfries” voters 😅
7:40 AM · Apr 10, 2016·Twitter for Windows Phone
 
Twitter
Whimsical Wordsmith
@Whimsical84
When McDonald’s started closing nationwide, they became disenFrenchfried.
7:26 PM · Jan 10, 2019·Twitter for iPhone
 
Reddit—3amjokes
Posted by u/zubbs99 February 11, 2020
Don’t let the government take away your favorite side dish.
They’re trying to disenfrenchfries you.