A bipartisan Senate group has agreed on a sweeping legislative proposal that would represent the most ambitious overhaul of the U.S. immigration system in three decades. The Washington Post will be examining portions of the bill on Post Politics in a series of blog entries.

Right now, those who come to the United States seeking asylum face a one-year deadline to apply for a visa. Under the Senate Gang of Eight's bill, that deadline would be completely lifted — a change that immigration and human-rights advocates are celebrating.