Reliable Source: Tim Duncan showed up at the White House without a tie, and that is a no-no

First there was the flip-flop flap, then the no-denim directive, and now the tie-less tiff? Dressing up (or down) at the White House can be a tongue-twisting affair, just ask Tim Duncan.On Monday, Duncan and his San Antonio Spurs teammates were invited to 1600 Penn. to celebrate the team's 2014 NBA championship. The presidential pat on the back is traditional, and everything was going by the book in the East Room -- canned punchlines, Spurs memorabilia, trophy ogling -- until it became clear tha...