President Donald Trump threatened on Sunday to shut down the federal government if the Democrats refuse to back his administration's proposed changes to immigration laws. “I would be willing to ‘shut down’ government if the Democrats do not give us the votes for Border Security, which includes the Wall! Must get rid of Lottery, Catch & Release etc. and finally go to system of Immigration based on MERIT! We need great people coming into our Country!" Trump posted on Twitter. "There are consequences when people cross our Border illegally, whether they have children or not — and many are just using children for their own sinister purposes."