JERUSALEM (AP) — Thousands of Israeli doctors walked off their jobs, labor leaders threatened a general strike and senior justices rushed home from a trip abroad on Tuesday, a day after the government’s approval of a law that weakens the country’s Supreme Court. Critics say the legislation will erode the system of checks and balances.

Four leading Israeli newspapers covered their front pages in black ink — an ominous image paid for by an alliance of high-tech companies. The only words on the pages were in a line at the bottom: “A black day for Israeli democracy.”