WASHINGTON (AP) — The Trump administration has frozen, stalled or otherwise disrupted some $430 billion in federal funds — from disease research to Head Start for children to disaster aid — in what top Democrats say is an “unprecedented and dangerous” assault on programs used by countless Americans.

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.

Top Democrats are accusing Trump administration of freezing nearly $437 billion in congressionally approved funds, potentially violating constitutional spending powers in a major budgetary dispute.