NBC REPORTER TO WHITE HOUSE SPOKESMAN: 'DON'T BE A JERK' Tue Feb 14 2006 08:54:18 ET NBCNEWS chief White House correspondent David Gregory warned President Bush's spokesman on Monday not to be a "jerk!" The heated exchange came during a press gathering at the White House. Gregory asked White House Press Secretary Scott McClellan about the Cheney hunting accident. 'David, hold on, the cameras aren't on right now,' McClellan replied. 'You can do this later.' 'Don't accuse me of trying to pose to the cameras,' Gregory said, voice rising. 'Don't be a jerk to me personally when I'm asking you...