In the Trump White House, it's getting lonely at the top.

President Donald Trump's fellow Republicans in Congress are showing signs of going their own way, both on politics and policy, determined to salvage what they can of their agenda on health care and tax reform in the wake of one of the most difficult weeks of any American presidency.

At the same time, Trump's failure to fill senior roles at federal agencies means he does not have a cadre of loyalists who can help rein in a bureaucracy that many in Trump's orbit believe are out to leak information intended to damage the president. That has worsened the isolation of the White House in a city that relies on friends and allies to shake off a crisis.