WASHINGTON – She’s calling for an “intervention” to save the nation from him. He says she’s “crazy.” The enmity between President Donald Trump and House Speaker Nancy Pelosi deteriorated Thursday into rude-and-then-some questioning of his fitness for office and her sanity, with personal attacks flowing from both the nation’s top elected officials after a dramatic blow-up at the White House. However intended, the exchanges left uncertain ahead of the 2020 election whether Trump and the Democrats will be able to work together on serious, must-pass tasks, such as funding the government and raising the federal borrowing limit, let alone thornier issues such as immigration, national security and more. Pelosi went first, with demure shrugs and practiced sass.