It’s been two weeks since Donald Trump’s inauguration sparked some of the largest rallies in American history. Each week since has also seen demonstrations, culminating in those that broke out at airports across the country at the end of January to protest the president’s new Muslim ban barring travel from seven predominantly Muslim countries. Mass protests are in large measure a bellwether of popular sentiment. They carry an implicit threat that politicians who defy the will of the people will be voted out, but that threat must be channeled strategically, or it will dissipate.