NEWYou can now listen to Fox News articles! FIRST ON FOX: President Donald Trump’s top trade advisor will huddle with House Republicans on Wednesday as the commander-in-chief’s tariff strategy is quickly becoming a flashpoint on the campaign trail.U.S. Trade Representative Jamieson Greer is attending the Republican Study Committee’s weekly lunch this week, a source familiar with planning told Fox News Digital.Two additional sources told Fox News Digital they expect lawmakers to raise the issue of Trump’s trade war with Canada.VANCE SAYS CANADA FRIENDLIER TO CHINA ON TRADE THAN TO US: ‘INSANITY’ It comes as tensions escalate between the U.S. and…