full-court press

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Basketball An aggressive defensive strategy in which one or two players harass the ball handler in the backcourt while the rest of the team maintains a close man-to-man or zone defense.
2. n. A strong, diversified effort: "The Administration undertook a full-court press to secure congressional approval” ( Abraham F. Lowenthal).

Wiktionary

1. n. basketball A coordinated maneuver, involving all team members, to block or interfere with the opposing team's attempt to advance the ball down the playing court.
2. n. figuratively, by extension A thorough, collaborative effort to overcome or constrain another person or group, especially a rival or opponent.