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 MerkleyDem 2020 hopefuls lead pack in opposing Trump Cabinet picks Poll: Senate should confirm Gorsuch A guide to the committees: Senate MORE (D-Ore.), to prohibit spending on rail projects unless the raw materials are U.S.-sourced;

Sen. Sherrod BrownSherrod BrownSanders, not Trump, is the real working-class hero A guide to the committees: Senate House bill would prevent Trump from lifting Russian sanctions MORE (D-Ohio), to boost Housing and Urban Development funding by about $7 million;

Sen. Jerry MoranJerry MoranYahoo reveals new details about security A guide to the committees: Senate Verizon, Yahoo slash merger deal by 0M over data breaches MORE (R-Kan.), to ensure $8 million is used for the Watershed Protection and Flood Prevention Act; and

Sen. Chuck GrassleyChuck GrassleyGOP senator grilled over DeVos vote during town hall Big Pharma must address high drug prices ­ObamaCare fix hinges on Medicaid clash in Senate 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.