The pro-immigration reform group backed by Facebook founder Mark Zuckerberg is launching an ad campaign against Iowa Republican Rep. Steve King, accusing him of “attacks on American soldiers and the military” for his staunchly anti-reform stance. The broadcast and digital ad buy in Iowa features King’s comments from an interview with Breitbart News saying he would oppose efforts to allow illegal immigrants brought to the United States as children, so-called DREAMers, to gain permanent residency by joining the military.