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 MerkleyJeffrey (Jeff) Alan MerkleyDems mull big changes after Brazile bombshell Dems push clearer GMO labeling Dems cheer Flake after scathing Trump speech MORE (D-Ore.), to prohibit spending on rail projects unless the raw materials are U.S.-sourced;

Sen. Sherrod BrownSherrod Campbell BrownTrump tells Senate Dems that 'rich people get hurt' in GOP tax plan Senate panel approves North Korea banking sanctions Trump names Powell as chairman of Federal Reserve MORE (D-Ohio), to boost Housing and Urban Development funding by about $7 million;

Sen. Jerry MoranGerald (Jerry) MoranAn unlikely bipartisan solution on energy and taxes Alexander struggles to find health-care breakthrough Overnight Tech: House Intel to release Russian Facebook ads | Trump tweet on NBC draws backlash | Senators want answers from alleged robocall king | Twitter reverses on Blackburn ad MORE (R-Kan.), to ensure $8 million is used for the Watershed Protection and Flood Prevention Act; and

Sen. Chuck GrassleyCharles (Chuck) Ernest GrassleySenators push mandatory sexual harassment training for members, staff Senate panel to hold hearing on bump stocks, background checks Senate panel to hold hearing on bump stocks 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.