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The amendment, sponsored by Sen. Amy KlobucharAmy Jean KlobucharRepublicans wrestle with impeachment strategy Klobuchar takes shots at health and education plans supported by Sanders and Warren O'Rourke campaign says path to victory hinges on top 5 finishes in Iowa, Nevada MORE (D-Minn.), was approved by voice vote.

The chamber also approved an amendment by Sen. Ben Nelson (D-Neb.) revising the criteria for an area to be designated "rural" in the U.S. Census. That amendment was approved by voice vote.

Sen. Pat Toomey (R-Pa.) saw both of his two amendments fail in the Senate. One amendment eliminates federal assistance for biobased products. The other amendment would have reformed a federal sugar program.