The House and Senate will soon start hammering out the stark differences between their immigration reform proposals. The Senate bill would put undocumented workers in the United States on a path toward citizenship. But the House version, firmly supported by the Republican leadership, omits such a plan, which many in the GOP call "amnesty." It stresses enforcement. Rep. James Sensenbrenner, a Wisconsin Republican, introduced the original House bill. As Judiciary Committee chair, he is expected to be the House's lead negotiator on the immigration bill. He spoke with U.S. News about how this is going to be a difficult bargaining...