There is, and always has been, a nexus of politics and water. At times this nexus resembles the irresistible force paradox when an unstoppable force meets and immovable object. In this case, a campaign slogan has become a political imperative that will meet the force of nature along the many water crossings of the Mexico-USA border. In fact, the Texas-Mexico border is defined as the mid-line of the Rio Grande River. Essentially three choices exist – build the wall down the mid-line, build it on the Mexican Side and ask the Mexicans to cede access to the river, or build it on the US side and voluntarily cede access to the river. My imagination isn’t flexible enough to stretch around any viable scenario where this will end well for anyone involved.