President Joe Biden on Wednesday urged unity among democracies in the face of Russia and China as he committed nearly $700 million to halt global democratic backsliding and forged an alliance against surveillance technology. Biden invited 121 leaders for his second, largely virtual "Summit for Democracy," including the prime ministers of close US partners Israel and India who both defended their records after charges of creeping authoritarianism. First conceived by Biden as a way to restore US credibility after Donald Trump's norm-shattering presidency and the attack on the US Capitol, the Summit for Democracy has taken a new urgency as…