>> Prepared at our border. We cannot have people flowing into our country illegally.>> President Donald Trump is raising the stakes in his bid to stop illegal immigrants, saying he would use the military to protect the southern border. A move sure to strain ties with Mexico.>> Until we can have a wall and proper security, we're gonna be guarding our border with the military.
>> Trump has demanded Mexico do more to stop a caravan of some 1,200 Central Americans moving toward the US border, putting Mexico in a tight spot. But the caravan episode is also heaping pressure on Trump, already feeling the heat from hardliners in his own party, who are angry he hasn't done more to tighten the border.
Reuters correspondent, Andy Sullivan.>> Trump's border wall isn't getting built and many of his most ardent conservative supporters aren't happy with that. Commentators like Laura Ingraham are pressuring him saying, where's our promised wall. So Trump's really feeling the heat here.>> In response, Trump has taken a much tougher tone on immigration.
Labeling the DACA program, protecting young immigrants, to be dead on Twitter,. Threatening to rip up the NAFTA trade deal with Mexico if it doesn't halt the flow of migrants. And on Tuesday, playing the military card, saying US troops would patrol the border until his wall is built.>> I think that it's something we have to do.
>> Policy experts question whether Trump has the authority to post troops on the border without approval from Congress. But if Trump follows through on the threat, it wouldn't be the first time.>> So there is some precedent for using the military along the border. President George W Bush did it around ten years ago.
But that's not the real issue, we have plenty of border agents already. What Trump's really frustrated about, what he's really trying to make happen, is building his signature border wall.>> Trump has pushed Congress to allocate $25 billion needed to build the wall. But the budget deal he signed last month offered a mere $1.6 billion for the project.
It has also left the fate of dreamers unresolved after Trump scrapped the Obama era program that had protected them from deportation.