U.S. Sen. Charles Grassley (R-Iowa) told Microsoft Corp. this week that U.S. citizens should get priority over H-1B visa holders as the software vendor moves forward on its plan to cut 5,000 jobs. "These work visa programs were never intended to allow a company to retain foreign guest workers rather than similarly qualified American workers, when that company cuts jobs during an economic downturn," Grassley wrote in a letter sent Thursday to Microsoft CEO Steve Ballmer. The letter asked Microsoft to detail the types of jobs that will be eliminated and how those cuts will affect the company's H-1B workers....