Early signs show the Trump administration’s hawkish trade policy having a small but growing drag on commerce. That could lead to a collision between President Trump’s desire to wage trade wars and his goal of stoking economic growth.

Trump has promised sustained economic growth and stock market success from his administration’s policies. But as his trade war deepens, business investment unexpectedly stagnated in the third quarter of this year, growing at a meager 0.8 percent, an early warning sign tucked into an otherwise optimistic gross domestic product report released Friday.