President Obama will host House Democrats at the White House next Tuesday for a “roundtable discussion,” press secretary Jay Carney announced on Friday. Vice President Biden will also attend the event, the White House said. Earlier this month, Senate Democrats met at the White House for a pre-State of the Union discussion. The president and senior staff mingled with lawmakers for drinks and policy discussions. Obama will be meeting with Democrats from the upper chamber again on Wednesday, when he's scheduled to address their annual retreat at Nationals Park. The meetings come as the party gears up for what is...