SORE LOSER WATCH…. I imagine it’s traumatic losing a close campaign one expects to win, but Rep. Marilyn Musgrave, a very conservative Colorado Republican, seems to be taking her Election Day defeat to Democrat Betsy Markey a little too hard.

Musgrave, a Republican who’s been representing Colorado’s 4th District since 2002, became part of the Republican Casualty List when she lost in a landslide, even after the National Republican Congressional Committee doled out almost a million bucks (reportedly $900,000) for her campaign.

Two weeks after the brutal loss, Musgrave still hasn’t called her opponent to concede or to congratulate the victor, as is not only textbook but also mannerly to do.

Moreover, Musgrave’s ill manners bleed into her own team. Rumor has it she still — 14 days later — hasn’t even thanked her campaign staff. (Again, textbook.)

Musgrave press secretary Joseph Brettell tells us: “It’s a campaign matter, and I have no further comment.”

Making matters slightly worse, it seems no one has seen or talked to Musgrave since her 12-point defeat. “[S]he’s all but disappeared,” the Politico’s Anne Schroeder Mullins reported.

It sounds rather alarming.

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Follow Steve on Twitter @stevebenen. Steve Benen is a producer at MSNBC's The Rachel Maddow Show. He was the principal contributor to the Washington Monthly's Political Animal blog from August 2008 until January 2012.