They may not have much to worry about. Coca-Cola did not actually say they would switch to make Coke with cane sugar now, just that:
“We appreciate President Trump’s enthusiasm for our iconic Coca-Cola brand,” the spokeswoman, Michelle Agnew, said in a statement. “More details on new innovative offerings within our Coca-Cola product range will be shared soon.”
Coca-Cola didn’t explicitly say it would use cane sugar for Coke made in the U.S., then.
Also:
Coca-Cola defends corn syrup after Trump claims he struck cane sugar deal
Coca-Cola offers no confirmation of recipe change, saying corn syrup is safe and widely used in US drinks
By Edward Helmore, The Guardian - July 17, 2025
https://www.theguardian.com/us-news/2025/jul/17/trump-coca-cola-cane-sugar-corn-syrup
The Coca-Cola company has defended its use of corn syrup after Donald Trump’s claim Wednesday that he had apparently convinced the brand to switch to using sugar cane in its US drinks, as it does in Mexico and the UK.
:
Initially, the drinks giant responded with a neutral statement of appreciation for “President Trump’s enthusiasm” for Coke, and a vague message about “new innovative offerings within our Coca-Cola product range” to come. On Thursday, however, the soft drinks company released an additional statement making positive claims about high-fructose corn syrup ….