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They are Sens. Max Baucus of Montana, Tom Harkin of Iowa, Mary L. Landrieu of Louisiana, Mark L. Pryor of Arkansas and John D. Rockefeller IV of West Virginia.

In the House, the key players will include the new chairmen of the Judiciary Committee and the subcommittee on immigration. Rep. Bob Goodlatte, Virginia Republican, is chairman of the full committee, and Rep. Trey Gowdy, South Carolina Republican, is chairman of the subcommittee.

Both are seen as being tough on immigration.