President Trump stepped up his advocacy for a new round of middle-class tax cuts Tuesday, gaining support from one key congressional Republican even as it became clear that most of the GOP was unaware of his plans.

“On this one, we’re doing a pure 10 percent tax cut for the middle class, in addition to what they’ve already gotten,” Trump told reporters in the Oval Office, referring to a tax-cut plan of his own conception that has surprised his party.