The committee's deliberations will precede a vote likely to send the articles to the full House, where a vote is expected next week.
Senate Majority Leader Mitch McConnell is expected to acquit President Donald Trump in the Senate if he's impeached in the House, not just dismiss the charges against him, two senators told CNN on Wednesday.
Democrats accuse Trump of abusing his power by trying to force Ukraine to investigate political rival Joe Biden and of obstructing Congress when lawmakers tried to look into the matter.
Into the night, Democrats and Republicans delivered sharp, poignant and at times personal arguments for and against impeachment.
Both sides appealed to Americans' sense of history: Democrats described a strong sense of duty to hold the president in check, while Republicans decried the process.
During Thursday's committee meeting, any member is able to offer amendments to the articles of impeachment, and the entire body can then debate it.
The committee is considering two articles of impeachment introduced by Democrats.
Lofgren's comments came a few minutes after Republican Congressman Steve Chabot said Clinton's impeachment was valid but insists the impeachment articles against Trump are not.
As the pressure campaign mounted, the Trump administration froze almost $400 million in military aid already allocated by Congress and promised a White House meeting for Ukraine's president. Hamstrung in the minority, Republicans wouldn't have the votes to make changes without support from at least some Democrats.
Republicans want to have a vote on acquittal - to clear the President of the charges against him - not simply rely on a 51-vote threshold procedural motion to dismiss the hotly disputed case.
Much of the impeachment focus has been on a July 25 phone call in which Trump asked Ukrainian President Volodymyr Zelenskiy to investigate Biden and his son Hunter who was on the board of a Ukrainian gas company.
McConnell doesn't bother pretending to be fair for the same reason House Republicans shamelessly lied throughout the impeachment hearings, and for the same reason Attorney General Bill Barr is shamelessly lying about the FBI investigation into Trump's collusion with Russians during the 2016 election.
"Using the powers of his high office, President Trump solicited the interference of a foreign government, Ukraine, in the 2020 United States Presidential election", Article I says.
"That's the wrong reason to impeach somebody, and the American people are seeing through this", Collins said.
No Senate Republicans have indicated so far that they are considering such a move.
Judiciary Chairman Jerrold Nadler said Democrats had to take action because Trump had endangered the U.S. Constitution, jeopardized national security and undermined the integrity of the 2020 election.
Republicans have called this process a "political vendetta" against the president.
Pence's power, which applies to legislation and nominations, isn't in effect when the Senate is weighing removing his boss, an obvious conflict of interest since he would replace Trump if he were removed.
A Senate trial is expected next month on the charges.
"Opinion on impeachment has been rock steady since news of the Ukraine call first broke", Patrick Murray, director of the independent Monmouth University Polling Institute, said in a statement Wednesday.