Printing is for personal, private use only. No part of this book may be reproduced or transmitted without publisher's prior permission. Violators will be prosecuted. While presidents from Truman through Reagan faced the continuous challenge of containing the Soviet threat during the Cold War, new presidents discover that campaign promises are difficult to implement in reality given budget constraints, public opposition to certain policies, and policies already put in place by their predecessors. Congress has also tried to assert more control over presidential war-making through acts like the War Powers Act, though presidents still find ways to circumvent congressional restrictions on deploying troops overseas.