Trump vows no end to shutdown until wall funded

US President Donald Trump vowed Tuesday he would not reopen the government until he gets $5 billion to fund his border wall, as the partial government shutdown dragged into a fourth day.Trump's demand for a physical barrier on the US-Mexico border -- a pillar of his election platform -- has been rejected by Democrats and some Republicans.In retaliation, Trump refused last week to sign a wider spending bill, temporarily stripping funding from swaths of the government.