USDA faces a big challenge in keeping the U.S. sugar market stable through years of depressed world prices.

The Senate is set to debate a popular bipartisan farm bill this week that senators from both parties are eager to pass amid the uncertainty in rural America over President Donald Trump’s trade policy.

For the second time in five years, House Republicans failed to pass a farm bill, this time because of conservative demands for action on immigration and fierce Democratic opposition to the legislation's food stamp reforms.

By a surprisingly large bipartisan margin, the House easily defeated the latest attempt by food and candy manufacturers to reduce sugar prices, rejecting an amendment that would have ended domestic marketing controls for the commodity. 

House GOP leaders hope to pass a farm bill this week over likely unified Democratic opposition, but Republicans head into the debate divided over critical amendments on sugar policy, crop insurance and other issues.

With a farm bill floor debate looming next week, House members have filed more than half a dozen amendments attacking various aspects of the crop insurance program and others seeking to tighten rules for commodity subsidies and to roll back the sugar program.

President Donald Trump told key lawmakers Thursday that the tighter work rules for food stamp recipients in the House GOP farm bill move "in the right direction," but he stopped short of threatening to veto legislation that doesn't include them.