The Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP) issued a formal warning to a Hartford Kwik Trip after the store raised its fuel prices more than once within a 24-hour period a violation of state law.The warning letter, dated April 13, 2026, was sent to Kwik Trip, Inc.'s Petroleum Department at its La Crosse headquarters. It states the violations occurred on January 5 and January 6, 2026, at the store located at 141…