Trump’s 15 percent corporate tax rate is the kindest cut of all 

Republican presidential nominee Donald Trump tossed out several reforms in his mega-long acceptance speech on Thursday night. But his best reform proposal, and one that would improve economic growth, is cutting the corporate income tax rate from 21 percent to 15 percent.  

As a reminder, Trump proposed a 15 percent corporate rate in his 2016 presidential campaign, but Republicans in Congress thought that was a bridge too far. Some Democrats suggested a compromise rate of 28 percent....