The House Can Play Hardball, Too. It Can Arrest Giuliani.

Two ways that Democrats in the House can match the White House’s aggressive tactics.

In his letter to House leadership, the White House counsel, Pat Cipollone, drew a line in the sand: The administration will not “participate in” the impeachment proceedings in any way. The odd language of “participate in” — presidential impeachment is not meant to be a collaboration between Congress and the president — obscures the central thrust of the letter: The White House is refusing to respond to any subpoenas or other demands for information from the...