Just hours after the votes were cast in the final Democratic primary, the Clinton campaign started reserving advertising blocks in eight battleground states on Wednesday, marking the presumptive Democratic nominee’s first significant attempt to define Donald Trump.

Clinton’s camp has already released one of the spots, which offers a harsh contrast between Trump — encouraging violence at his rallies and mocking a reporter’s disabilities — and the former secretary of state. Other spots are expected to be softer focus, positive ads about Clinton.

By reserving time in key swing states — at least Colorado, Florida, Iowa, Nevada, New Hampshire, North Carolina, Ohio, and Virginia — the Clinton camp is sending an unmistakable message to the presumptive GOP nominee that it intends to press into traditionally Republican territory without spending too much time worrying about defending traditionally Democratic destinations where Trump insists he will compete, said a handful of high-level Democrats close to the Clinton effort.

The ad barrage — slated to start on Thursday — will combine with a weeks-old onslaught from the major pro-Clinton super PAC, Priorities USA Action, which has already blanketed swing states with its own blistering negative spots and plans to stay on air until Election Day.