BUDAPEST, Hungary — On a night when Katie Ledecky returned to a more familiar spot — the top rung of the medal podium — the U.S. men’s team began passing the torch to a new generation at the world championships. Kalisz extended American dominance in the 200-meter individual medley Thursday with a bit of Olympic redemption, ably filling the void left by Phelps’ retirement and Lochte’s absence in Budapest. “Big congrats to my little bro!!!” Phelps wrote on Instagram to his former training partner at the North Baltimore Aquatic Club. Dressel, 20, put the United States back on top in swimming’s glamour event, pulling away to a dominating win in the 100 freestyle. Ledecky earned her fourth gold of the championships by anchoring the U.S.