At a rally in Phoenix, President Donald Trump said he's willing to shut down the government to build the so-called U.S.-Mexico border wall.
"The obstructionist Democrats would like us not to do it, but believe me, if we have to close down our government, we're building that wall," Trump said.
Trump has supported a shutdown over the budget in the past. Lawmakers agreed on a temporary budget at the end of April that included money for border security, but not for construction of a barrier.
The U.S.-Mexico border project was a major part of Trump's presidential campaign, and he's famously said again and again Mexico would pay for it. Some estimates put the cost of the project at over $21 billion.