Sen. Sherrod Brown, D-Ohio, holds a double-digit lead in a new
NBC News/Wall Street Journal/Marist poll released early Thursday.
Brown has 52 percent to GOP Treasurer Josh Mandel's 41 percent in the survey, while 6 percent of voters remain undecided. Their previous poll, conducted in late Sept. and early Oct., had Brown at 50 percent to Mandel's 41 percent.
A number of recent live-caller polls have showed Brown leading by double digits, though two GOP-leaning automated polls showed a closer race after last week's presidential debate.
The poll also shows President Obama leading Mitt Romney 51 percent to 45 percent.
The NBC/Wall Street Journal/Marist poll was conducted Oct. 7-9 and surveyed 994 likely voters. The margin of error is plus-or-minus 3.1 percentage points.