"Protect trans futures," "don't capitulate to hate" and "break the silence" read the slogans on some of the banners brandished by the crowds of protesters, at least one of whom was detained by police, an AFP correspondent saw.
Netanyahu is in Washington for talks with the new Trump administration on a second, longer-term phase of Israel's fragile truce with the Palestinian militant group Hamas, which has not yet been finalized.
The aircraft, which the Federal Aviation Administration said was a Learjet 55 executive aircraft, crashed around 2330 GMT into the densely-populated district of the city, packed with homes, shops and busy roads.
Trump has promised to impose 25 percent tariffs on immediate neighbors Canada and Mexico, pointing to their failure to stop illegal immigration and the flow of fentanyl across US borders.
The offer went out to the federal workforce through a new system the Trump administration set up that gives officials the ability to email all federal employees at once.
