Donald Trump's broad assertions of power appear to be advancing an aggressive version of a legal doctrine called the "unitary executive" theory that envisions vast executive authority for a president,

President Donald Trump will need the Supreme Court, with three justices he appointed, to enable the most aggressive of the many actions he has taken in just the first few weeks of his second White House term.

A mounting wave of lawsuits and court orders is slowing a dizzying effort to tear apart basic structures of the administrative state.