At weekend rallies, the GOP nominee read from a hand-held script and offered endorsements for the re-elections of a trio of Capitol Hill Republicans whom he had toyed with rebuffing. On Monday, he will head to Detroit to deliver an economic policy address that is expected to draw contrasts with Democratic nominee Hillary Clinton.
Many in Mr. Trump’s party have been clamoring for weeks to see these kinds of adjustments. If he is to persuade Republican skeptics to buy back into his campaign, just weeks before the crucial post-Labor Day stage, the unorthodox, first-time candidate now must show he can make the changes stick.

Mr. Trump hopes for a reboot with his Detroit speech, which will talk about “the tepid economy under Obama and Clinton, versus the kind of growth economy that Mr. Trump wants to build,” Trump campaign chairman Paul Manafort said Sunday on Fox News…

Mr. Trump in his speech is expected to give broad strokes about his economic plan, particularly to underscore his support for tax cuts. He is also likely to reiterate his plan to create a single top business tax rate that would apply to corporations and to businesses that pay taxes through their owners’ individual returns.