No Country For Republican Senate Challengers

I'm going to start to write about House races, Senate races, initiatives and referenda and other down ballot races.

The filing deadline passed today for Republicans in Arkansas to field a credible challenger against Sen. Mark Pryor (D), and so Democrats have one less seat to worry about.

The GOP's strongest potential challenger in South Dakota, businessman Steve Kirby, has likewise declined to run against Sen. Tim Johnson (D).

In fact, of the 12 Democrats up this cycle, only one of them -- Sen. Mary Landrieu, faces a challenge worth calling a challenge, from state treasurer John Kennedy.

Prognosticator Charlie Cook has four Republican-held or incumbent toss-ups and one likely Dem pick-up -- Virginia.

So getting to 60 is not a pipe dream.