American politics have not been so bitter and divided since Benjamin Franklin and John Adams were forced to share the same bed in 1776.
There is a fundamental incompatibility - if not mutual revulsion - that divides our politics and its focus has fittingly become a debate over a wall.
Does the reality at the border matter?
After securing only part of the funding that he sought, President Trump declared a national emergency along the southern border to allow him to start construction with over $8bn (£6.2bn) of shifted funds to complete his signature campaign promise. For their part, the Democrats are promising immediate court challenges.
There is little evidence of a true national security emergency on the US border with Mexico. Most illegal immigrants overstay their visas or pass through ports of entry. Moreover, the number of apprehensions are down from 1.6 million in 2000 to roughly 400,000 in each year of Trump's term.