It's the second time since leaving office he has been listed as inactive in the state.
The Senate Leadership Fund is spending $10.5M on television with the rest for radio and mail.
The environmental activist praised Patty Judge as an "environmental champion."
Sen. Chuck Grassley is leading his primary challenger by 9 points in Iowa.
He raised $2.2 million in the first nine days after entering the race on June 22.
The new ad highlights Rubio calling Trump a "con man."
Romney warns of Clinton winning by "too large a margin."
The canceled reservation was valued at $568,000.
McCaul said "a lot of people" have encouraged him to run against Cruz.
OPINION | No evidence of a trickle down effect from Trump-Clinton race