WASHINGTON — A large corporate marketing firm co-founded and led by Stephanie Cutter, a senior adviser to Kamala Harris’s failed presidential campaign, recently laid off 10% of its staff amid a steep revenue disruption following the Democrat’s loss, The Post has learned. The nine-person layoff unleashed an outpouring of criticism about allegedly hypocritical treatment of employees by Precision Strategies, which is staffed by prominent Democrats and counts many of America’s top corporations and unions as clients. “She was telling people that she lost a lot of business after the election. And she has also been telling people companies are being...