The proposed Trans-Atlantic Trade and Investment Partnership would strengthen the U.S. and European Union economies without compromising regulatory standards, EU Commission Vice President Jyrki Katainen said. “TTIP would be the cheapest way to stimulate economic growth on both sides of the Atlantic,” Katainen said Wednesday in a speech at the Atlantic Council in Washington. The European Commission last week said the euro area’s largest countries are troubled by their debt loads, hampering their efforts to jump-start economic recovery.