Over 1,400 Salesforce employees have signed a letter calling on CEO Marc Benioff to drop potential business with the U.S. Immigration and Customs Enforcement agency, two people familiar with the effort told CNBC. "We are deeply troubled by recent press reports describing Salesforce pitches of AI technology to U.S. Immigration and Customs Enforcement (ICE) to help the agency 'expeditiously' hire 10,000 new agents and vet tip-line reports," the letter reads. The letter calls on Benioff to cancel "