Obama will arrive with a delegation that includes the CEOs of Xerox and Marriott International  to help nudge along deals in the works. U.S. airlines are set to resume commercial flights to Cuba this summer, a New York-based research facility is working with Cuban researchers on a lung cancer vaccine, and an Alabama-based tractor company has won approval to build a factory near Havana. Hotel chains Marriott and Starwood could announce their own deals during the president’s trip, according to a report in The Wall Street Journal. And AT&T could join Sprint and Verizon in providing roaming services on the island.  See More at … Obama plans to kick-start U.S. business with Cuba on Havana trip next week