WASHINGTON — The chairman of the House Judiciary Committee asked President Donald Trump on Friday to say whether he’ll send his attorneys to participate in impeachment proceedings before the panel.

Rep. Jerrold Nadler also is asking Republicans on his committee which witnesses they plan to ask permission to subpoena.

The letters from the New York Democrat came as the House probe enters a new phase with a hearing next week on whether Trump’s actions might constitute impeachable offenses.

Two weeks of Intelligence Committee hearings produced a mountain of testimony but didn’t seem to move the needle on Capitol Hill, where not a single House Republican supported establishing the chamber’s impeachment process.

Nadler instructed Trump and top panel Republican Doug Collins of Georgia to respond by the end of next week. The Judiciary Committee meets Wednesday in an informational hearing to examine the “constitutional grounds for presidential impeachment” and could move some time after that to hearings where witnesses testify about Trump’s actions with Ukraine.