[JURIST] Mexico City mayor Lopez Obrador [advocacy website in Spanish] returned to work Monday despite government contentions that that was illegal and that he had in fact lost his job after the country's Congress lifted his immunity from prosecution earlier this month on a contempt charge. Hundreds of thousands of Mexicans turned out over the weekend to demonstrate [La marcha del silencio advisory] in his favor; the charges that were formally filed against him last week [JURIST report] are temporarily in legal limbo after a judge sent them back to prosecutors on a technicality. Obrador wants to run against current Mexican president Vicente Fox in upcoming national elections, but would probably be blocked from doing so if convicted. Reuters has more.