House Democrats, disturbed by what they see as the destruction of a historic landmark, are demanding answers about the forthcoming White House ballroom. In a letter to President Trump, a trio of Democrats expressed concern about “transparency, funding priorities, the physical integrity of the White House and the ethical integrity of the Administration it houses.”

Rep. Robert Garcia, the top Democrat on the House Oversight Committee, along with Democratic Reps. Yassamin Ansari of Arizona and Jared Huffman of California, wrote that decisions about the ballroom addition “were made in complete secrecy” and without “public disclosure or proper consultation.”

This week, demolition crews began dismantling the White House East Wing to make room for the privately funded ballroom, which is expected to exceed 90,000 square feet. Mr. Trump said the cost of the building had ballooned to $300 million, up from its original estimate of $200 million in July.