Presidential polls: President Obama leading in Iowa, NBC News/Wall Street Journal/Marist poll says

Washington (CNN) -- President Obama will wrap up his re-election campaign Monday with a rally in Des Moines, Iowa, a campaign official confirmed to CNN. During the day Monday, Obama will be stumping in Wisconsin and Ohio before heading to Iowa. The Monday stops will cap a weekend of cross-country campaigning.

Iowa was crucial to the president's 2008 victory - both his win in the state's caucuses that helped propel him to the Democratic nomination, and he captured the state in the general election with a 54%-44% victory over John McCain.

He has visited the state at least 11 times this year.

While the state only has six electoral votes, they could be key depending on how some of the larger states break.

Obama was at 50% among likely Iowa voters, and Romney at 44%, according to a NBC News/Wall Street Journal/Marist poll released Thursday. That's slightly tighter than earlier in October, though the result was just outside the poll's sampling error of plus or minus 2.9 percentage points. A poll released Wednesday indicated a much tighter race in the Hawkeye State - the University of Iowa survey had Obama at 42.7% and Romney at 41%.

Mitt Romney will be ending his campaign Monday with an event in Manchester, New Hampshire - another small state whose four electoral votes could be pivotal. Romney, who has visited Iowa at least 14 times this year, will be stopping in Dubuque, Iowa on Saturday as part of his last weekend campaign blitz.