MSNBC political analyst and contributor Pat Buchanan failed to disclose pollster Frank Luntz's Republican ties on the October 31 edition of MSNBC's Scarborough Country, which Buchanan was guest hosting.

At the end of September, MSNBC dropped Luntz from its planned presidential debate coverage, apparently in response to a letter from Media Matters for America that outlined Luntz's GOP ties and questionable polling methodology. Before MMFA wrote to MSNBC, the network had repeatedly featured Luntz, without identifying him as a pollster with strong Republican ties (more on Luntz's partisan bent here and here). When Luntz returned to MSNBC as a guest three weeks after the first presidential debate, the network accurately identified him as a Republican pollster, as MMFA noted on October 22.

MSNBC's failure to identify Luntz's party affiliation on the October 31 edition of Scarborough Country appears to mark a return to its practice before MMFA's September 28 letter:

BUCHANAN: We're going to begin with brand new polls released today, and in a remarkable development, two of them are dead tied. Here to help us, Frank Luntz, a pollster who studied these numbers as carefully as [President George W. Bush's chief political aide] Karl Rove.