I have been fascinated this cycle by the Democratic Senatorial Campaign Committee’s unwillingness to give up on a few races that seem well beyond its grasp. Its enormous financial commitment to Pennsylvania ($4 million to date) is at least questionable and getting little in the way of results.

But the DSCC’s continued campaign spending in Missouri ($2.2 million) has appeared to be ludicrous, considering that Democrat Robin Carnahan has been running so far and so consistently behind her Republican opponent in the polls.

So it’s little surprise to read today that they are pulling out.

The DSCC is moving TV ad money out of Missouri, a sign that the Senate race may be moving beyond Democrats’ grasp.

Four Republican sources who monitor media buying and three Missouri TV stations have confirmed to Hotline On Call that the DSCC has canceled reservations from Oct. 11 to Oct. 25. …The ad cancellations are an indication that national Democrats are growing bearish on Secretary of State Robin Carnahan’s (D) chances against Rep. Roy Blunt (R), as polling shows Blunt with a sizable lead.

Given the growing problems they face in Wisconsin, West Virginia and Washington State, this seems like a needlessly delayed but wise move for them. Never throw good money after bad.