; and (11) the courts of the United States have improperly implied immunity from the antitrust laws based on Federal regulatory statutes, even limiting the application of statutory antitrust savings clauses passed by Congress. (b) Purposes The purposes of this Act are to— (1) deter exclusionary conduct that harms competition, particularly by dominant firms; and (2) enhance antitrust enforcement by the Department of Justice, the Federal Trade Commission, the State enforcement agencies, and private parties. 3. Definition In this Act, the term antitrust laws — (1) has the meaning given the term in subsection (a) of section 1 of the Clayton Act ( 15 U.S.C. 12 ); (2) includes— (A) section 5 of the Federal Trade Commission Act ( 15 U.S.C. 45 ) to the extent that such section applies to unfair methods of competition; and (B) this Act and the amendments made by this Act. 4. Exclusionary conduct (a) In general The Clayton Act ( 15 U.S.C. 12 et seq.) is amended by inserting after section 26 ( 15 U.S.C. 26a ) the following: 26A. Exclusionary conduct (a) Definitions In this section: (1) Exclusionary conduct (A) In general The term exclusionary conduct means conduct that— (i) materially disadvantages one or more actual or potential competitors