Loyalists to influential Iraqi cleric Moqtada al-Sadr broke into the parliament building in Baghdad on Saturday, the second time they have done so this week, and started a sit-in protest, an escalation of a months-long political impasse. A rival group meanwhile called for rallies, raising fears of a showdown. Parliament speaker Mohammed al-Halbousi suspended the session until further notice, Iraq’s state news agency INA reported. Pro-Sadr protesters were able to enter Baghdad’s highly fortified Green Zone, which houses the parliament, government buildings and foreign missions, including the US…