Analyst: Russian investigators grill opposition in vote crackdown Alexander Kynev, Russian political analyst, explains potential consequences after Russian investigators summoned a number of opposition politicians for questioning after the authorities staged night-time raids and jailed top Kremlin critic Alexei Navalny for 30 days. The crackdown comes as opposition politicians fight to get on the ballot for a Moscow parliament election in September amid falling approval ratings for President Vladimir Putin. IMAGES AND SOUNDBITES