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Which headline best illustrates the operation of checks and balances?
(1) “President Andrew Johnson Impeached by the House of Representatives”
(2) “President Dwight Eisenhower Sends Troops to Little Rock”
(3) “President Ronald Reagan Engages in Arms Reduction Talks with the Soviets”
(4) “President George W. Bush’s Approval Ratings Drop Due to the Iraq War”
(1) “President Andrew Johnson Impeached by the House of Representatives”