KEY POINTS
  • Democratic incumbent Sen. Claire McCaskill leads Republican challenger Josh Hawley by 4 percentage points among likely voters when third party candidates are included, according to an NBC News/Marist poll released Tuesday.
  • McCaskill's edge among likely voters falls within the poll's margin of error, signaling a tight contest in one of this year's most important Senate races.
  • President Trump's aggressive trade policy hasn't resonated with Missouri voters, according to the poll. Only 28 percent of likely voters believe tariffs protect jobs and help the economy.
Sen. Claire McCaskill 

The race for Democratic Sen. Claire McCaskill's coveted seat in Missouri is neck and neck, a new poll finds.

McCaskill leads Republican challenger Josh Hawley by 4 percentage points among likely voters when third party candidates are included, according to an NBC News/Marist poll released Tuesday. The senator garners 44 percent of support and Hawley draws 40 percent, while Libertarian Japheth Campbell and Green Party candidate Jo Crain get 5 percent and 3 percent, respectively. McCaskill's edge among likely voters falls within the poll's margin of error, signaling a tight contest in one of this year's most important Senate races.