Elta North America, an Israeli-owned defense manufacturer, has been named as a contender to build the wall.
Poll responses indicate most people back Trump on the economy, jobs and fighting terrorism, but not on immigration, foreign affairs and heading the government.
Donald Trump vowed to provoke a government shutdown unless Congress funds his border wall, but it may be averted.
The Israeli army has revealed details of a wall in the planning since 2014.
The president is betting that harnessing the power of the sun will decrease the cost of the wall.
The money will cover the cost of new barriers in Texas and California.
The German chancellor grew up in Eastern Germany before the fall of the Berlin Wall.
Donald Trump is not the only leader in the Americas upsetting his neighbors by building a wall.
Democrats want the spending bill to keep government open to include a funding guarantee for Obamacare subsidies, and no policy riders.
Last time the government shut down it cost about $24 billion in economic output. Here's what you need to know about the potential 2017 shutdown.
In threatening to shut down the government, President Trump gives Democrats the upper hand.
"Eventually, but at a later date so we can get started early, Mexico will be paying, in some form, for the badly needed border wall," Trump said in a Twitter post.
Trump wants the money included in spending legislation that Congress must pass by Friday to keep the federal government operating through Sept. 30.
Republican Senator Roy Blunt said money for the wall likely would not be part of a spending bill that must pass by April 28 to avoid shutting down federal agencies.
Building a wall is expensive symbolism; it won't prevent catapults, submarines or laundered cartel money.
Foreign Minister Luis Videgaray said Mexico could respond to any tax the United States were to unilaterally impose on imports from its southern neighbor to finance the wall with levies on select goods.
Building such a wall could have far-reaching consequences for the ecological landscape of the U.S. and Mexico.