The Wall Street Journal reports that State Republican leaders are increasing pressure on Congress to overhaul the Affordable Care Act if the Supreme Court rules that subsidies on the federal exchange are invalid. Republicans from 33 states are urging federal legislators to develop a plan that would free states from setting up their own exchanges to salvage subsidies. Republicans have been coming together around a congressional GOP option that would preserve subsidies to offset insurance premiums for as long as two years, but would repeal other parts of the law. Arkansas, Delaware, Pennsylvania have received preliminary approval from the federal government to use HealthCare.gov to become state-run exchanges. Michael Cannon, one of the architects of the Supreme Court lawsuit, said any efforts by the Obama administration to make it easier for states that go that route could face legal challenges.