For more than a year, Republicans have argued that veteran Democratic Congressman Ike Skelton "is voting 95 percent of the time with" U.S. House Speaker Nancy Pelosi, a San Francisco Democrat.
Republicans Vicky Hartzler and Bill Stouffer regularly used that number during their primary campaign from August 2009 until Hartzler won the nomination this year, and Hartzler has continued the drumbeat in speeches and advertisements running up to Tuesday's general election.
But, it's a statistic Skelton's campaign objects to.
They started airing a television ad last week saying the number is misleading - that Skelton is being counted for more than 1,500 votes while Pelosi is being counted on fewer than 100 votes - and that Skelton and Pelosi voted the same way on only 74 of those votes.
In the activity of the last weekend of the campaign, the Skelton campaign did not respond to an e-mailed request to describe some of the votes where Skelton and Pelosi voted the same way, and where they differed.
Hartzler told reporters last week: "We're just using the Washington Post rating scale, that they use nationwide, to rank a congressman's (voting) percentage with the speaker's."