In the united states, both the executive branch, led by the president, and the legislative branch, led by congress, share responsibility for passing laws. if congress passes a bill that the president disagrees with, the president can veto it, preventing it from becoming law. congress can override the veto with a two-thirds vote in each of its two legislative houses. which idea does this scenario best represent? a. popular sovereignty b. human rights c. social contracts d. checks and balances