Political parties are essential in the US Congress as they shape debates and control the legislative agenda. Their party affiliation influences priorities and committee activities. While they do not determine every law, they significantly guide what issues get addressed. ;
Political parties are crucial in US Congress as they shape debates and control the legislative agenda. The party in power influences priority issues and committee activities, affecting which bills are voted on. Therefore, the correct answer is D: shapes the debate and controls legislative agenda.
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