Incumbent Republican Sen. Mark S. Kirk Tuesday is releasing an ad challenging Illinois Democrat Tammy Duckworth’s commitment to welcoming Syrian refugees into the country without additional government screening.  

According to the Kirk campaign, the nascent spot, titled “Trust,” is expected to air statewide for the next three weeks. The ad criticizes Duckworth for voting against the American SAFE Act, the proposal calling for more stringent vetting of immigrants from the Middle East which cleared the House with bipartisan support just before the Thanksgiving break.