The U.S. Senate entered a marathon voting session Thursday on a Republican-backed bill to fund Immigration and Customs Enforcement and Customs and Border Protection.

Senators began the process late Wednesday after a party-line vote to advance the measure. The legislation would allocate roughly $70 billion over several years for immigration enforcement operations through the end of President Trump's term.

The session features a "vote-a-rama," an all-night or extended series of amendments and procedural votes typical in budget reconciliation efforts. This process allows the bill to pass with a simple majority, bypassing the filibuster.

Republicans stripped certain provisions from earlier drafts, including a proposed "anti-weaponization fund," to address internal concerns and move the package forward. The Senate voted 53-46 on Wednesday to begin debate.

Democrats have criticized the measure for prioritizing enforcement spending over other domestic priorities. Republicans argue the funding is essential to strengthen border security and support large-scale deportation efforts.

The bill represents a key step in the GOP's strategy to increase resources for ICE and related agencies. Earlier budget resolutions laid groundwork for the reconciliation package.

Passage would send the measure to the House for consideration. Lawmakers aim to complete action ahead of any summer deadlines.

The ongoing votes highlight partisan divides over immigration policy and federal spending priorities.