1) 1st District: City of Manila; 2) 2nd District: Mandaluyong City, Marikina City, Pasig City, Quezon City, San Juan City; 3) 3rd District: Caloocan City, Malabon City, Navotas City, Valenzuela City; 4) 4th District: Las Pinas City, Makati City, Muntinlupa City, Paranaque City, Pasay...