President Donald Trump and Congress are on a collision course over government funding this week, as the White House demands money for a border wall with Mexico and Democrats vow it will never see a penny.But just five days out from a government shutdown, Trump appears headed for disappointment. Democrats are signaling they’re unlikely to cave, and Hill Republicans are already pressing the administration to fight another day.That means the White House is largely on its own in a high-stakes game of political chicken, weakening its negotiating position.