Trump's legislative priorities outlined, challenged amid Russia investigation

Health care and tax reform remain at the top of the White House agenda.

"There is no doubt that keeping members focused on investigations detracts from our legislative agenda and detracts from what we’re trying to deliver to the American people, to what extent I think is hard for me to answer," Short said Monday.

Asked more broadly about the challenges posed by the president going off-message on Twitter, Short countered that the president usually helps advance the White House agenda.

"I think that the president is often very effective in driving our message in Congress, and I think that’s why you’re going to see him engaged the way he is this week," Short said.

Short later offered a more direct endorsement of the president’s effectiveness as a messenger.

"I think that the president’s efforts have been helpful to us, period," he said.

Health care and tax reform continue to be at the top of the priority list, Short said. The White House's legislative push heading into the summer, he added, will be on healthcare and the fiscal year 2018 budget. In the fall, the White House hopes to turn the focus to reconciling the budget with tax reform.

As for a package on infrastructure, which has been the White House's policy focus this week, Short said the goal is to accomplish legislation “this calendar year.”

"The plan will provide tax cuts by simplifying the tax code, broadening the base and increasing growth," he said.

"I think that there’s a natural step in which each chamber says they are going to start over but I think at the end of the day," he said, "there’s going to be a lot of similarities."

Pre-existing conditions, which have been a major sticking point in the negotiation process, will be handled in a similar fashion to how they were handled in the House bill that was passed in early May, he indicated.

"We look forward to working with Congress to figure out the right vehicle on that," he said.