Mitt Romney holds a slight edge over President Obama in a nationwide poll published by NPR on Tuesday, but Obama leads by 4 percentage points in the dozen states most likely to determine the winner of an election that is only one week away.
Romney, the Republican nominee, leads Obama, 48 percent to 47 percent, in the national survey. But the president has a 50-46 advantage in the critical states of Nevada, Colorado, New Mexico, Iowa, Wisconsin, Michigan, Ohio, Pennsylvania, New Hampshire, Virginia, North Carolina and Florida.

Comments
I wonder where the pollsters are getting their participants? Neither I, my family or any of my friends answers any phone #'s we do not recognize on caller ID. So what is the use of polls? Are they only sampling people too dumb to screen their calls?