Factbox: Trump's policies on immigration, economy, other issues

(Reuters) - Republican presidential candidate Donald Trump wants to build a wall on the border with Mexico, boost spending on the military and slap trade tariffs on China. Here are those positions and others the real estate developer, who has never held elective office, has put forward to convince the American people that he should be the next U.S. chief executive: ECONOMIC POLICY Trump has proposed collapsing the current seven income tax brackets to three with rates of 12 percent, 25 percent an