<P> Incumbent Democrat Claire McCaskill is running for reelection , but is seen by many pundits as a vulnerable incumbent , as only 46 % of her constituents approve of the job she is doing in the United States Senate . McCaskill 's slightly unpopularity and the Show Me State 's reddening landscape have given Republicans cautious optimism , despite McCaskill 's double digit victory in 2012 . Missouri Attorney General Josh Hawley is seen as a favorite to challenge her by many GOP donors . </P>
<P> Incumbent Democrat Claire McCaskill is running for reelection , but is seen by many pundits as a vulnerable incumbent , as only 46 % of her constituents approve of the job she is doing in the United States Senate . McCaskill 's slightly unpopularity and the Show Me State 's reddening landscape have given Republicans cautious optimism , despite McCaskill 's double digit victory in 2012 . Missouri Attorney General Josh Hawley is seen as a favorite to challenge her by many GOP donors . </P>
who is running for us senate in missouri
who is running for us senate in missouri
Incumbent Democrat Claire McCaskill
Incumbent Democrat Claire McCaskill