Washington (CNN) Two competing legislative proposals aimed at providing disaster relief failed to advance in the Senate on Monday amid a fight over funding for hurricane-ravaged Puerto Rico.

The Senate first voted on a GOP proposal that Democrats objected to because they argued it did not provide adequate aid for Puerto Rico. That vote was 44-49. The second measure that came up for a vote was a relief measure that passed out of the Democratic-controlled House months ago. Republicans criticized that legislation for not providing relief for recent flooding that has devastated the Midwest. That vote was 46-48.

The failure of both measures will send lawmakers back to the drawing board in search of a compromise that can pass. It also puts lawmakers from both sides of the aisle in a politically precarious position and opens senators up to attacks from the opposing party accusing them of blocking much-needed disaster aid.

The GOP legislation authored by Senate Appropriations Chairman Richard Shelby would allocate roughly $13.5 billion for rebuilding and recovery from natural disasters such as tornadoes, earthquakes, hurricanes and wildfires. The legislation includes $600 million to pay for nutrition assistance for Puerto Rico.

Democrats opposed the Republican Senate proposal in part, because they argue it does not include enough aid for hurricane-ravaged Puerto Rico. Republicans, meanwhile, have criticized Democrats for their opposition by pointing to the fact that the House-passed legislation does not include relief for recent flooding that has devastated the Midwest.

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