Senate Democrats are looking to intensify the Russia-related investigations on Capitol Hill despite a call from Republican National Committee Chairwoman Ronna McDaniel to abandon the “collusion” track for lack of evidence – with plans to grill Attorney General Jeff Sessions and even a bid to get President Trump under oath. While Trump has not responded to the invitation, Sessions already has agreed to answer questions Tuesday before the Senate Intelligence Committee in the probe of Russian meddling in the 2016 presidential race. Presuming that hearing goes forward, the big question is whether Sessions will testify in public – and in...