Santos will be released on $500,000 bond now that his arraignment has concluded.

At his arraignment, where he pleaded not guilty, Magistrate Judge Anne Shields read a summary of the charges against Santos and notified him of his rights -- to which Santos replied, "Yes, ma'am."

Santos confirmed that he had read the indictment and had consulted with his attorney.

Before the hearing began, Santos' attorney, Joe Murray, told a group of reporters that Santos was feeling "good" and was looking forward to the hearing, where he was "finally going to get to address the allegations."

-ABC News' Olivia Rubin and Lucien Bruggeman

Santos has pleaded not guilty to all charges at his arraignment at the Long Island federal courthouse.

Santos' lawyer, Joe Murray, and congressional aide Vish Burra have entered the Long Island federal courthouse where Santos is scheduled to be arraigned this afternoon.

Neither responded to questions from reporters as they made their way inside.

About a dozen GOP members of the House had previously called on Santos to resign or be expelled from Congress in the face of allegations against him, and several of them are reiterating that stance today.

In a statement today, fellow New York Rep. Nicole Malliotakis, said, "The charges against Rep. Santos are extremely serious and deeply disturbing and as I've previously said, he simply doesn't have the trust of his constituents or colleagues. The sooner he leaves, the sooner his district can be represented by someone who isn't a liar and fraud."

Rep. Marc Molinaro, R-N.Y., told reporters on his way into a conference meeting this morning, "I can't wait for him to be gone."

Rep. Tony Gonzales, R-Tex., tweeted, "George Santos should be immediately expelled from Congress and a special election initiated at the soonest possible date," while Rep. Steve Womack, R-Ark., told reporters, "This has been going on now since we took the majority. Frankly, I would have hoped along the way that Mr. Santos would have done what I believed was the right thing and not force leadership to force his action, but for him to do it on his own."

The office of Rep. Max Miller, R-Ohio, says his position remains unchanged from the his Jan. 12 statement which said, in part, "I do not believe George Santos can effectively serve and should resign."

In other statements released Tuesday night by Santos' fellow New York Republicans, Rep. Nick LaLota said, "These charges bring us one step closer to never having to talk about this lying loser ever again," while Rep. Mike Lawler said, "I reiterate my call for George Santos to step down" and Rep. Anthony D'Esposito said, "As a retired NYPD Detective, I am confident the justice system will fully reveal Congressman Santos' long history of deceit, and I once again call on this serial fraudster to resign from office."

Other GOP House members from New York who have previously called for Santos to step down include Rep. Nick Langworthy and Rep. Brandon Williams.

Rep. French Hill, R-Ark., told CNN Tuesday night, "I do believe that if a member of Congress is charged with a federal crime they should resign," and Rep. Nancy Mace, R-S.C., told CNN, "We should really hold our own accountable and recruit someone who's going to be better."

-ABC News' Lauren Peller, Gabe Ferris, Katherine Faulders and Jay O'Brien