The open border fantasy is the biggest lie that Trump and his supporters are spreading. And since there is no basis in fact, it is getting to sound pretty silly. The Democrats have voted for ever reasonable border security measure to date. More people were deported under Obama then any previous president. Border crossings are at a forty year low. And many thousands have left the US and gone back home. What the democrats are against is tens of billions of dollars for a wall that will not make a significant difference. Democrats have worked with Republicans with a focus on more attention to the 40% of illegal immigrants that get here via other forms of transportation and overstay their visas. Democrats have supported the hiring of more border control agents. And mostly, Democrats have worked with Republicans on various plans to increase and expand the use of technology to deter border crossings. The problem remains that multiple proposals never make it to the floors of congress for consideration.