>> If we don't get border security, we'll have no choice, we'll close down the country.>> US President Donald Trump threatened to shut down the federal government if Congress does not provide more funding for a border wall with Mexico. Trump ditched the annual White House Correspondents' Dinner for the second year in a row Saturday, instead holding a rally of supporters in Michigan.
>> USA, USA!>> Where he hammered home a key campaign promise.>> We need the wall, we're gonna have it all. And again, that wall has started, we got 1.6 billion.>> That 1.6 billion included in last month's budget bill, which keeps the government running through September, fell way short of Trump's request of 18 billion.
>> I will never sign another bill like this again.>> But by threatening a shut down ahead of November's midterm elections, Trump could be putting his party in a tight spot. Republicans in Congress shied away from a shut down in favor of a spending deal in February. They're unlikely to support closing down the government as they face difficult reelection contests.
Trump cited the hundreds of Central American migrants traveling in a caravan as one of the reasons for strong border security.>> Are you watching that mess that's going on right now with the caravan coming up? And our laws are so weak, they're so pathetic.>> Migrants, who include women and children, have said they fled their homes in Guatemala, El Salvador, and Honduras because of death threats from gangs, the murder of family members, or political persecution.