More on immigration bill

Senators pushing a new immigration policy appealed Sunday to wavering supporters ahead of renewed debate on securing the borders and dealing with 12 million undocumented immigrants. A fragile compromise was pulled from the Senate in early June, and then resurrected after bipartisan negotiations with the White House. The bill awaits a crucial test vote this week. With several senators distancing themselves from the proposal, the outcome was too close to call.

The measure would tighten borders, require workplace verification and create a guest worker program. It also would lay out a way by which the estimated 12 million people illegally in the U.S. could gain legal status and work toward citizenship. President Bush long has advocated an immigration overhaul. On Saturday, he urged lawmakers to "summon the courage" to support what could be the last major legislative achievement of his presidency. "The status quo is unacceptable," he said in his weekly radio address. But he faces dissension from fellow Republicans who demand better border security and oppose any policy that suggests amnesty for undocumented immigrants.