Tensions ran high when Veterans Affairs Secretary Robert McDonald was grilled about mismanagement within the VA system during a House hearing Wednesday – a major veterans group is demanding an apology.Rep. Mike Coffman, R-Colo., a 22-year Marine Corps veteran, who saw combat in Iraq in the 1990s then returned to the country on active service in 2006, was questioning McDonald about Denver’s failed VA hospital construction project and accusing him of glossing over problems within the system when things got testy.After citing cost overrun and scheduling problems with a VA hospital construction in Denver, Coffman said it was a symbol...