US President Donald Trump delivers a speech at the White House on January 4, 2019. (Photo: AFP/VNA)

Graham said if talks fail during that period, Trump could go ahead and declare a national emergency to bypass Congress and get money for a wall on the US-Mexico border, the issue that triggered the shutdown last month. Trump has held out the option of declaring a national emergency if he cannot get a deal with lawmakers. Democrats have refused further negotiations until the government is reopened.