Political Ad Spending Surges As Battle Shifts To Fall Campaign.

With results still being counted in Tuesday’s voting, the primary calendar is winding down and attention is turning to the general election — and the ads that come with it. The ad-tracking firm AdImpact says more than a half-billion dollars already reserved for eight battleground Senate races in the coming months. AdImpact says $549 million in fall reservations is now targeting the eight…