Iowa Senator Joni Ernst is worried about the effect new tariffs on steel and aluminum will have on agriculture. President Trump signed an order Thursday imposing the tariffs and shortly after that, Ernst released a statement. She says she's concerned about retaliation by other countries that could affect Iowa farmers, especially the salke of Iowa soybeans to China. Trump's action means imported steel would be hit with a 25 percent tariff while aluminum would be subject to a ten percent tariff.