Walter Shaub's castigation came after the Republican said his party will no longer give special treatment to deep-pocket corporate donors if they get too "woke."
The most recent flashpoint was in Georgia, where a new GOP-backed law restricting voting rights drew harsh criticism from Delta Air Lines and Coca-Cola.
The Senate Minority Leader still wants companies to give freely to political campaigns.
A familiar-looking bottle appeared in a picture with the former president.
It looks like Trump is sneaking Diet Cokes while calling on everyone else to boycott Coca-Cola.
Georgia-based corporate giants like Coca-Cola and Delta Air Lines spoke against the new voting restrictions after consumers threatened to boycott.
The company largely stood by as Georgia passed one of the biggest crackdowns on voting rights in recent history.
Coca-Cola and Home Depot are standing up against the Republican-led effort to roll back voting access in Georgia.
Republicans in Georgia are trying to make it harder to vote, and the pressure is on big corporations to voice their dissent.
When the former president visited the restaurant at his D.C. hotel, he loved Diet Cokes, junk food and hearing Heinz ketchup bottles make "pop" sounds.