Which job classification is likely to have the greatest pay and responsibilities?

When President Obama succeeded in getting Congress to pass the Affordable Care Act (signed into law on March 23, 2010, with the goal of improving the health care system of the United States and of protecting those without health insurance),

what presidential roles did he fulfill? What will be an ideal response?

Liberty and equality __________ one another

a. have no relation with b. can never reinforce c. always meld well with d. may often conflict with