Senator Chris Murphy is holding his second “Walk Across Connecticut”.  He began in  Killingly on Sunday morning and plans to walk 103 miles through 21 towns over five days.  He's holding a series of pop-up town halls along his route, including Wednesday in Newtown.  The event is planned for the Edmond Town Hall Gym at 6:30pm.  His last stop will be at noon in Danbury at Rogers Park.