One January evening, Waleed Shahid, a Democratic strategist based in New York, sent out a seven-page memo to over 100 people. It outlined a dramatic plan to show the White House that voters want President Joe Biden to change course in Gaza, and included a call for for an immediate cease-fire in a conflict that has killed more than 30,000 Palestinians. The plan centered around the Democratic presidential primary in Michigan — a crucial swing state that is home to the largest Arab and Muslim population in the U.S. Shahid’s memo summarized talking points and what needed to be done to…