U.S. LAWMAKERS SUPPORT GULF ACTION American lawmakers rallied behind President Reagan for the U.S. strike against Iranian targets in the Gulf but the attack fueled a sharp new White House-Congress debate over limits on his powers to make war. The Pentagon announced on Monday that U.S. warships destroyed a non-producing oil platform used for monitoring Gulf ship traffic and military operations, and also raided a second Iranian oil rig in retaliation for an earlier Iranian attack on a Kuwaiti ship flying the American flag. Many Democrats, who control Congress, and Republicans expressed support for the attack and praised it as an appropriate "measured response." But Democrats and liberal Republicans voiced new fears that the growing confrontation between Tehran and the United States could erupt into a major war, and demanded that Reagan comply with the 1973 War Powers Act, which could lead to a pullout of American forces from the waterway. "Those who contend the strike was necessary must realize their words are easily construed as a tacit endorsement of war with Iran," said Sen Mark Hatfield of Oregon, a Republican.