NBC News, which keeps the most widely followed of the media electoral-college estimates, on Friday night said it is moving the closely watched battlegrounds of Virginia and Colorado to “lean Obama,” putting its estimate for the Democratic nominee over the 270 electoral votes needed to win the presidency. President Bush won each of those states by 5 points or more in both 2000 and 2004. Before the move, NBC’s count had Sen. Barack Obama (D-Ill.) at 264 electoral votes, to 163 for Sen. John McCain (R-Ariz.), with 111 as tossups. “We’re going to be, this weekend, moving Virginia and Colorado...