WASHINGTON — Supporters of President Barack Obama’s trade agenda hope to fend off hostile Senate amendments today and send a major trade bill to the House, where another fierce debate awaits.

Senators also plan to address the government’s soon-to-expire authority to collect bulk data on Americans’ phone records. Many senators will press leaders and colleagues to wrap things up in time to start the weeklong Memorial Day recess Saturday.

Pro-trade senators survived a Democratic-led effort Thursday to block Obama’s agenda, with two votes to spare. Now they hope several hours of votes on amendments will clear the way for Senate endorsement of “fast track” negotiating authority for Obama.

The authority would allow Obama, like earlier presidents, to propose trade agreements that Congress could reject or ratify, but not change. He says it’s crucial to advancing a long-negotiated trade pact with 11 other Pacific Rim nations. Other accords could follow.

Obama’s allies secured crucial Democratic support on trade Thursday by agreeing to allow a Senate vote next month on reauthorizing the Export-Import Bank. The bank guarantees loans for U.S. exports, and many House conservatives want to end it.

Obama called Thursday’s Senate action “a big step forward.” He predicted new trade deals will “open up access to markets that too often are closed.” The president had telephoned wavering senators late Wednesday night.

Labor unions and key liberal groups oppose free-trade deals, saying they send U.S. jobs to nations with low wages, lax environmental laws and poor safety standards. The political dynamics force Obama to rely heavily on Republicans, who oppose him on most other issues.

The trade measure is one of three major bills facing senators as they anticipate the scheduled weeklong break.

Legislation to renew the Patriot Act is on the calendar, as is a bill to renew authority to commit federal funds for highway and bridge construction. Both face a June 1 deadline.

Senate Majority Leader Mitch McConnell, R-Ky., is intent on keeping the antiterrorism Patriot Act from lapsing while Republicans control the House and Senate.