The second, from Sen. Jim Webb (D-Va.), would establish the National Criminal Justice Commission. Both amendments need 60 votes for passage.

At 2 p.m., the Senate will vote on four additional amendments from:

Sen. Jeff MerkleyJeff MerkleyRussia probes in limbo after special prosecutor announcement Special counsel appointment gets bipartisan praise Lawmakers unveil bill to combat Sessions' push for tougher sentences MORE (D-Ore.), to prohibit spending on rail projects unless the raw materials are U.S.-sourced;

Sen. Sherrod BrownSherrod BrownOvernight Finance: Trump moves to begin NAFTA talks | Dems press Treasury chief on taxes, Dodd-Frank | Biz leaders want tax changes to be permanent Mnuchin mum as Dems press for answers on tax reform, Dodd-Frank Sherrod Brown looks to defy Trump trend in Ohio MORE (D-Ohio), to boost Housing and Urban Development funding by about $7 million;

Sen. Jerry MoranJerry MoranWeek ahead: Obama's CIA chief to testify on Russia probe IT modernization bill passes House Cost of key cyber bill drops by billions after revisions MORE (R-Kan.), to ensure $8 million is used for the Watershed Protection and Flood Prevention Act; and

Sen. Chuck GrassleyChuck GrassleyFeinstein: Comey memos 'going to be turned over' Judiciary chair may call for meeting with Mueller Bad intel from Russia influenced Comey's Clinton announcement: report MORE (R-Iowa), to require an audit of grants awarded by the attorney general, an amendment aimed at increasing accountability following the failed "Fast and Furious" gun-tracking program implemented by the Justice Department.

Several amendments are still in order, but many are likely to be denied a vote as the Senate races to complete work on the spending bill, H.R. 2112, by the end of this week.

Before work on amendments, the Senate will vote at noon on the nomination of Heather Higginbottom to be deputy director for the Office of Management and Budget.