MEXICO CITY — Hundreds of protesters broke into Mexico’s Senate on Tuesday as lawmakers weighed a contentious plan to overhaul the country’s judiciary, forcing the body to take a temporary recess for the safety of the senators. The shut down came just hours after Mexico’s ruling party, Morena, wrangled the votes it needed to jam through the proposal after one member of an opposition party flipped to support it. [time-brightcove not-tgx=”true”] That move and other political maneuvering ahead of a vote on the plan championed by outgoing President Andrés Manuel López Obrador fueled even more outrage after weeks of protests by judicial employees and law students. Critics and observers say the plan, in which all judges would be elected, could threaten judicial independence and undermine the system of checks and balances. Some protesters entered the Senate chambers in an effort to block the vote after they said lawmakers were not listening to their demands.