What has Barry done to bring down unemployment? He's overseen the worst recovery from a recession in modern economic history! The US economy has managed to scratch and claw it's way back DESPITE the ACA which was a jobs killer and Obama's total lack of a plan to grow jobs or the economy for much of the past six years!
His policies, like all presidents, either help or hinder job growth. I doubt it's possible to identify which policies helped or hurt. Same holds true with Reagan.
I can name several Obama policies that hurt. He's the most anti-business President I've seen in my lifetime.
Increased taxes on corporations, increased taxes on individual income for those making over 450K a year, burdening our industry with Commie Care with either forcing them to provide coverage for their employees or fining them. More burdensome IRS reporting because of Commie Care, attacking businesses such as the Roll-Your-Own cigarette shops which had to close down, same with the American Indians who used to sell their products via US mail, the several attacks on Gibson Guitar, The Gulf oil drilling and all the industries around it that they fed, the coal industry, the energy industry, the credit card industry and the list goes on and on.
With Reagan, Bush and even Clinton, you can at least point to some presidential action that was responsible for an improved economy. You can't do that with DumBama. Most all of his policies were against business--not for it.