Newt would not be making policy...only working the Presidents policies through the Halls of Congress.
The vast majority of Republican politicians are for free trade because that’s the conservative position, tariffs are taxes, taxes are bad. Most democrats and labor unions back protectionism and higher taxes on American consumers. Gingrich was a long time proponent of free trade, big backer of NAFTA.
But you guys may be glad to hear that Newt has flip-flopped to try and get this gig, says he now agrees with Trump on trade.
http://www.politico.com/story/2016/07/newt-gingrich-trump-trade-vice-president-225035
Flip flopping is what Newt does best.