House Democrats Introduce Bill to Curb Executive Power

House Democratic leaders introduced on Tuesday a much-anticipated package of proposed new limits on executive power, launching a post-Trump push to strengthen checks on the presidency that they hope will compare to the overhauls that followed the Watergate scandal and the Vietnam War.

Democratic lawmakers have been negotiating with the Biden White House to refine their broad set of proposals, which amount to a point-by-point rebuke of the ways that President Donald J. Trump flouted norms.

The legislation, called the Protecting Our Democracy Act, would make it harder for presidents to take a series of actions, including offering or bestowing pardons in situations that raise suspicion of corruption; refusing to respond to oversight subpoenas; spending or secretly freezing funds contrary to congressional appropriations; firing inspectors general or retaliating against whistle-blowers; and taking “emoluments” or payments while in office, including from commercial transactions.

At a news conference on Tuesday, Speaker Nancy Pelosi of California said executive power had been gradually growing for years but that threats to the system of separation of powers seriously “picked up steam” during the Trump administration. She portrayed the bill as an “inoculation” against future abuses of presidential authority.

Ms. Pelosi had directed Democrats to compile various bills containing ideas for curbs into the package, which is chiefly sponsored by Representative Adam Schiff, Democrat of California.

The two appeared at an event with lawmakers who chair several committees that contributed pieces, including two New York representatives, Jerrold Nadler of the Judiciary Committee and Carolyn Maloney of the oversight committee, and Representative John Yarmuth of Kentucky, the chairman of the Budget Committee.

Ms. Pelosi has not announced any timeline for when the bill might come to the floor, though Mr. Schiff has said he hopes the House will pass the package “this fall.”

It is expected to face headwinds in the Senate, where it would need the support of at least 10 Republicans to bring it to a vote. There, supporters say, the package is likely to be broken into pieces that will be attached to other bills.