U.S. President Donald Trump is traveling to the U.S.-Mexican border Thursday to get a first-hand look at the country's efforts to thwart illegal immigration, the White House announced Monday.Press secretary Sarah Sanders said Trump would "meet with those on the frontlines of the national security and humanitarian crisis" along the 3,200-kilometer southern U.S. border. She said more details of the trip would be announced soon.Trump's visit to the border would come in the midst of what is now a 17-day partial government shutdown centering on a dispute over his demand for more than $5 billion in funding to build a barrier to block migrants, most of them from Central American countries, from crossing into the United States. Opposition Democrats have blocked funding for the wall, but offered $1.3 billion in new spending for border security.There was no end in sight Monday for the shutdown that has halted about a quarter of U.S. government operations since December 22nd.Trump, however, now is saying he would agree to a steel barrier instead of a concrete wall he has long vowed to build.Trump said again Monday that he could declare a national emergency to build the wall without approval from lawmakers, but added on Twitter, "Let's get our deal done in Congress! Trump's tweet referenced Democratic Congressman Adam Smith, the new chairman of the House Armed Services Committee, citing him as saying there is a provision in the law that allows the president to declare an emergency. Later on CNN, however, Smith said that declaring an emergency would be "horrible policy" and a "terrible idea," and that the president would be challenged in court if he sought to build the wall without congressional authorization. The Trump administration called for approval of $5.7 billion for the wall, along with another $800 million for "urgent humanitarian needs" to take care of migrants arriving at the border trying to enter the United States.But Democrats opposed to Trump's demand for the wall said there was no progress in talks over the weekend over how to resolve the border security issue and reopen the government.Democrats in the House of Representatives plan to starting passing legislation aimed at funding individual agencies that have been shuttered, but the president says he is opposed to a piecemeal approach that does not resolve his demand for a wall. Democrats have offered $1.3 billion in new border security funding, but nothing for a wall. As a new work week began in the United States, about 380,000 government workers remained furloughed, while another 420,000 were deemed essential and required to work with no idea when they will receive their next paycheck. In past U.S. government shutdowns, the workers were paid retroactively once the funding impasses were resolved and Washington officials expect the same thing will occur again this time.Trump said Sunday he can "relate" to the workers missing paychecks starting this week, but said he expects the 800,000 workers "that are on the receiving end will make adjustments. They always do. People understand what's going on."He said, "Many of those people that won't be receiving a paycheck, many of those people agree 100 percent with what I'm doing," although there has been no survey of government workers' views on Trump's wall proposal. Some border security officials said they agree with his demand for a wall. Democratic House Speaker Nancy Pelosi said a priority would be to reopen the Treasury Department and Internal Revenue Service, "an action necessary to make sure working families received their tax refunds on schedule."Senate Majority Leader Mitch McConnell rejected a previous House package that would have funded most of the agencies through the end of September and the Department of Homeland Security for a month to allow for further border security negotiations. McConnell called the plan a "non-starter," saying it was a waste of time for the Senate to vote on any shutdown-related legislation that Trump opposes.House Majority Leader Steny Hoyer called on McConnell to bring the new set of bills reopening individual agencies to a Senate vote once they pass the House. "They are essentially the same funding bills that the Republican Senate wrote and approved by a 92-6 margin during the last Congress," Hoyer said in a statement Sunday.Trump contends the wall is needed to stop migrants from illegally crossing into the U.S. from Mexico, as well as preventing drug trafficking and terrorism.Democrats say the wall is immoral and would be an ineffective and expensive effort.Trump said Sunday that if Democrats are willing to make a deal, one could be reached "in 20 minutes if they want to."Otherwise, Trump said, the shutdown is "going to go on for a long time."