From Saturday's Washington Post story; the subhead is,
[Title:] It's Called the Library of Congress. But Trump Claims It's His
[Subtitle:] The case is the latest example of efforts by the Trump administration to erase the traditional lines that separate the branches of government.
[First two paragraphs:] The Trump White House has a new target in its campaign to expand executive power: the Library of Congress. Never mind the name—administration lawyers are now arguing that the main research library of the legislative branch doesn't actually belong to Congress at all.
A legal push to claim the Library as executive turf isn't a one-off. It's the latest move in a broader effort by President Donald Trump and his administration to erase the traditional lines that separate the branches of government….
Later paragraphs likewise give the Administration's actions with regard to the Library as part of "the Trump administration's disregard for the separation of powers."