The Israel-Hamas conflict is opening new rifts in the House Democratic caucus‚ with a second Congressional Progressive Caucus quitting the group over the war and Rep. Rashida Tlaib backing an activist campaign to undermine President Joe Biden in the Michigan Democratic primary. The new developments underscore that‚ more than four months in‚ Israel's military operations in Gaza are still causing a painful rift within a Democratic Party that’s occasionally struggled to project both security-...