US farmers have launched a fresh campaign to push back President Donald Trump's upcoming tariffs on steel and aluminum imports, fearing foreign retaliation would seriously hurt their export-dependent industry.?

Released by Farmers for Free Trade, the 30-second ad will be aired for at least the next few weeks on cable news networks such as Fox, CNN and MSNBC, as well as online and on rural agricultural programs across the country.?

Trump signed proclamations for a 25% tariff on steel imports and 10% tariff on aluminum imports, raising concerns both at home and abroad about a possible trade war or tit-for-tat between the US and its trading partners.?The Chinese mainland trailed Canada in 2017 as the second-largest export market for US agricultural goods. China bought $19.6 billion in US farm goods in 2017, accounting for 14.2 percent of US agricultural exports.