The Next Republican Group Targeting Mary Landrieu

American Crossroads is the latest group to take aim at the embattled Louisiana Democrat.

Senator Mary Landrieu, a Democrat from Louisiana, left, listens as Senator Heidi Heitkamp, a Democrat from North Dakota, speaks during a news conference at the U.S. Capitol in Washington, D.C., U.S., on Tuesday, Nov. 18, 2014.

Photographer: Andrew Harrer/Bloomberg

American Crossroads is the newest player in the Republican tag-team against Senator Mary Landrieu.

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