The DSCC returns to Kentucky in its bid to oust the top Senate Republican

The official Democratic group working to saving the party’s Senate majority is going back on the air to provide a late boost to Alison Lundergan Grimes, the Kentucky Democrat trying to throw out Senate Minority Leader Mitch McConnell, a week after the group shocked political observers by appearing to pull out of the race.

The Democratic Senatorial Campaign Committee will reserve $650,000 in advertising, according to a DSCC official, who said that internal polling shows undecided voters turning to her.

A week ago, it appeared that Grimes would be left on her own as she entered the home stretch of the race with the DSCC going dark in Kentucky. A Real Clear Politics polling average shows McConnell with a slim but persistent lead.

It is unclear if the DSCC ad buy will move the needle in Grimes favor, but the spending will take away money the Democrats could use elsewhere.

Election handicappers place the odds in favor of Republicans to take the majority; the GOP needs a net gain of six seats and have pickup opportunities in many states, including Montana, West Virginia, Alaska, Louisiana, Arkansas, Colorado, New Hampshire, Iowa and North Carolina.

The DSCC ad buy was first reported by Politico.