The Republicans control the Senate and have been largely muted about the allegations and inquiries into fellow-Republican Mr Trump.
The ad called out Biden, who as vice president told Ukraine the United States was prepared to cancel $1 billion in loan guarantees unless it dumped a top prosecutor.
"So if the so-called "Whistleblower" has all second hand information, and nearly everything he has said about my "perfect" call with the Ukrainian President is wrong (much to the embarrassment of Pelosi & Schiff), why aren't we entitled to interview & learn everything about the Whistleblower, and also the person who gave all of the false information to him", Trump tweeted Tuesday.
When asked what they thought about the news, 43 percent said "president Trump is trying to smear Joe Biden ahead of the 2020 presidential campaign", up 4 points from last week.
"I would have no choice but to take it up", McConnell told CNBC on Monday.
"Under the Senate rules, we are required to take it up if the House does go down that path".
The majority of the New Jersey delegation supports impeachment, including both Cory Booker and Robert Menendez in the Senate, plus House members Andy Kim, Tom Malinowski, Donald Norcross, Frank Pallone, Bill Pascrell, Donald Payne, Mikie Sherrill, Albio Sires, and Bonnie Watson Coleman.
The House Intelligence Committee is also seeking documents from the State Department, and last week it sent a subpoena to Secretary of State Michael R. Pompeo.
"He didn't even know that it was wrong", said House Speaker Nancy Pelosi, describing her own phone call from Trump in which the president suggested the documents would exonerate him.
Schiff "illegally made up a FAKE & awful statement, pretended it to be mine as the most important part of my call to the Ukrainian President, and read it aloud to Congress and the American people".
According to a tally taken last week by NBC News, 225 Democrats of the 235 member House caucus support an impeachment inquiry against the president, along with one independent, Rep. Justin Amash of MI. Giuliani has not returned a request for comment. Fox News host Tucker Carlson presented his audience with a photo of the former vice president and his son Hunter golfing in the Hamptons with Devon Archer, an executive of the Ukrainian gas company Burisma Holdings.
Joe Biden's Ukraine narrative was upended during Monday's "Tucker Carlson Tonight". He was given until 15 October to respond.
Trump on Monday continued to defend himself against the accusations.
"We expect this situation to worsen and become even more risky", the letter said.
He said his committee right now is deciding whom they want to interview, declining to comment on if they've issued subpoenas or if they want to speak with Giuliani, among others.
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