FILE PHOTO: A dredging boat of the Luxembourg-based company Jan De Nul sprays sand at the shore on the Parana river near Rosario, Argentina, January 31, 2017. Picture taken January 31, 2017. REUTERS/Marcos Brindicci/File Photo By Leila Miller and Maximilian Heath BUENOS AIRES - U.S. House Foreign Affairs Committee Chairman Rep. Brian Mast has warned U.S. Secretary of State Marco Rubio of "Chinese malign influence" in a bid for a major contract in Argentina, according to a letter seen by Reuters.