WASHINGTON (Reuters) -U.S. President Donald Trump's administration has so far withheld at least $436.87 billion of congressionally approved funding, the top Democrats on the U.S. Congress' appropriation committees said on Tuesday. The frozen allotments span the federal government, according to the first estimate of the potential impoundments in the project led by Senator Patty Murray from Washington and Representative Rosa DeLauro from Connecticut. Almost $42 billion was frozen or canceled for the State Department, including the frozen support for USAID, along with another $62 billion-plus in competitive grant funding for the Transportation Department, according to the estimate.