A group of moderate Democrats quietly gathered in Virginia last month — and hatched a comeback plan to try to distance the party from the far-left and win back the working class by embracing “patriotism.” Third Way, a centrist-leaning Democratic think tank, put together the soul-searching retreat in Londoun County, a roughly hour drive from Washington, DC, and invited elected leaders, consultants, staffers and others to critically assess the party’s woes “Activist groups and progressive staffers push unpopular cultural positions, making it seem like Democrats are more extreme than they actually are,” said a summary paper from the retreat and...