Executive Summary I. Introduction II. Role of European Parliament in the EU’s Trade Policy 1. EU’s Trade Policy and the EP’s Involvement 2. Changes in EP’s Competences after the Lisbon Treaty III. Literature Review of Voting Patterns of European Parliament 1. The Voting Patterns of European Parliament 2. US Congressional Voting on Trade Policy IV. Econometric Analyses 1. Trade Legislations Examined 2. Votes by Political Groups and Countries 3. Empirical Test of Votes (Probit Model) V. Conclusion References