Trade, Trump and the Economy: What Does Greg Mankiw's Textbook Say?

http://cepr.net/blogs/beat-the-press/trade-trump-and-the-economy-what-does-greg-mankiw-s-textbook-say

From the site:

If we generate $100 billion in demand by having the government spend more money or by replacing $100 billion in imports with $100 billion in domestically produced goods and services, it has the same effect on output. In a context where there are major political obstacles to larger budget deficits (think Peter Peterson, Paul Ryan, and the Washington Post), a smaller trade deficit may be the most plausible route back to full employment.