now, u.s. republican candidate donald trump has release vealed a tax plan that promises economic growths quell as tax cuts for many americans. >> billionaire businessman says this is his thing, it's in his wheelhouse, it's what he does. this is his expertise but does all of this measure up against his rival's plan? >> these numbers are really spectacular. >> reporter: tonight donald trump delivering more policy proposals. unveiling a plan that slashes taxers for the wealthy. this still looks like a big tax cut. >> this is a tax reduction. big tax reduction. includesing for the upper income. >> reporter: under trump's plan, individuals earning less than $25,000 and married couples earning less than $50,000 would pay nothing. but trump also gives the wealthiest americans like himself a huge tax break, cutting the rate from nearly 40% to just 25%.