NEW YORK — Shrugging off the prospect of a government shutdown, liberal activists are demanding that Democrats protect thousands of young immigrants from deportation, no matter what. The conflict comes to a head this week as the Republicans who control Congress scramble to get enough votes — including some from Senate Democrats — to avoid the partial shutdown. On Capitol Hill, Democrats are being urged to let the shutdown happen unless Republicans and President Donald Trump agree to restore a program that protects from deportation some 700,000 people who were brought to the U.S.