The Logic of American Politics 9th Edition by Samuel Kernell , Gary C. Jacobson , Thad Kousser , Lynn Vavreck

Why does the American political system work the way it does?  

Find the answers in The Logic of American Politics. 
This best-selling text arms you with a toolkit of institutional 
design concepts―command, veto, agenda control, voting rules, 
and delegation―that help you recognize how the American political 
system was designed and why it works the way it does. The authors 
build your critical thinking through a simple yet powerful idea: 
politics is about solving collective action problems.  

Thoroughly updated to account for the most recent events and data, 
the Ninth Edition explores the increase in political polarization, 
the growing emotional involvement people have to politics, Americans’ 
reactions to changing demographics, the partisan politics of judicial selection, 
and the changing nature of presidential leadership. Revised to include the 2018 election 
results and analysis, this edition provides you with the tools you need to make sense of today’s government.