WASHINGTON — President Donald Trump took a new swipe at Attorney General Jeff Sessions on Monday, referring to him in a tweet as “beleaguered” and wondering why Sessions isn’t digging into Hillary Clinton’s alleged contacts with Russia. Fuming about the ongoing investigations into Russian meddling in the 2016 election and questions as to whether his campaign colluded with foreign officials, Trump again focused his ire on Sessions, who was once one of the president’s closest allies. “So why aren’t the Committees and investigators, and of course our beleaguered A.G., looking into Crooked Hillarys crimes & Russia relations?” Trump tweeted Monday.