Top GOP super PAC plans Montana ad blitz

The largest super PAC backing Senate Republicans has reserved more than $10 million in airtime in Montana, a sign that another state is turning into a Senate battleground.The Senate Leadership Fund has reserved the time for advertisements that will bolster Sen. Steve Daines (R), who faces what is likely to be a difficult campaign for reelection against Gov. Steve Bullock (D).A Senate Leadership Fund spokesman confirmed the reservation, first…