CNN
Now playing
02:50
Congressman to Cuomo: I love you but ...
e-skin wearable health someya spc intl_00001205.png
e-skin wearable health someya spc intl_00001205.png
Now playing
03:09
Electronic skin could track your vital signs
AirTag
Apple
AirTag
Now playing
01:17
See AirTag, Apple's new device for tracking your lost stuff
ABC/Fremantle North America/19 Entertainment
Now playing
01:27
Katy Perry consoles 'Idol' contestant after he flubs lyric
NASA/JPL
Now playing
01:29
Watch the Ingenuity helicopter's first flight on Mars
Marvel Entertainment
Now playing
01:13
Marvel introduces first Asian superhero in new trailer
Consumer Product Safety Commission
Now playing
01:08
Video shows child getting caught under Peloton treadmill
CNN
Now playing
02:56
Watch Anderson Cooper belly laugh with Cheri Oteri
US Navy
Now playing
01:28
Pentagon confirms UFO video is real, taken by Navy pilot
Now playing
01:24
How Kyra Sedgwick got the cops called on Tom Cruise
Fancy Feast/Purina
Now playing
01:06
Cat food company makes a cookbook ... for humans
Google Earth's new timelapse feature
Google
Google Earth's new timelapse feature
Now playing
01:09
Google Earth's new Timelapse feature shows 40 years of climate change in just seconds
Twitter | @brady9dream
Now playing
02:10
Pet owners pitch their pups to be dog brew's 'Chief Tasting Officer'
FOX/"The Masked Singer"
Now playing
01:23
'The Masked Singer' reveals identity of The Orca
LONDON, ENGLAND - DECEMBER 07:  A visual representation of the digital Cryptocurrency, Bitcoin on December 07, 2017 in London, England. Cryptocurrencies including Bitcoin, Ethereum, and Lightcoin have seen unprecedented growth in 2017, despite remaining extremely volatile. While digital currencies across the board have divided opinion between financial institutions, and now have a market cap of around 175 Billion USD, the crypto sector coninues to grow, as it continues to see wider mainstreem adoption. The price of one Bitcoin passed 15,000 USD across many exchanges today taking it higher than previous all time highs.  (Photo by Dan Kitwood/Getty Images)
Dan Kitwood/Getty Images
LONDON, ENGLAND - DECEMBER 07: A visual representation of the digital Cryptocurrency, Bitcoin on December 07, 2017 in London, England. Cryptocurrencies including Bitcoin, Ethereum, and Lightcoin have seen unprecedented growth in 2017, despite remaining extremely volatile. While digital currencies across the board have divided opinion between financial institutions, and now have a market cap of around 175 Billion USD, the crypto sector coninues to grow, as it continues to see wider mainstreem adoption. The price of one Bitcoin passed 15,000 USD across many exchanges today taking it higher than previous all time highs. (Photo by Dan Kitwood/Getty Images)
Now playing
03:10
Bitcoin has an energy problem
The new all-electric Mercedes-EQS
Mercedes-Benz AG
The new all-electric Mercedes-EQS
Now playing
01:05
See the new all-electric EQS luxury sedan from Mercedes

Story highlights

Rep. Darrell Issa stands by Donald Trump's claim that millions of people voted illegally in the election

He says the debate is really about how to restore confidence in America's voting system

(CNN) —  

Republican congressman Darrell Issa debated CNN’s Chris Cuomo on “New Day” Monday about Donald Trump’s claim that millions of people voted illegally in the presidential election.

“I’m not saying it was close, but you shouldn’t say millions,” Cuomo said, citing studies he’s read. “It’s a gross exaggeration.”

The President-elect said in a tweet that in addition to winning the Electoral College, he would have also won the popular vote “if you deduct the millions of people who voted illegally.” Hillary Clinton leads Trump in the popular vote by more than two million ballots.

Cuomo argued that voter fraud is real, but said studies show the number of occurrences is nowhere near the millions.

Issa then pushed back.

“Chris, I love you,” he said. “But you are, in fact, talking about dozens and I’m saying out of 320 million Americans it is a lot more than dozens.”

The California congressman also said that “in every district in America, especially those who don’t have any kind of ID, people do vote illegally.”

The back and forth continued with Issa relenting, momentarily, on the numbers.

“Chris, I love you,” Issa repeated. “But you know you have to remember it’s about bringing confidence back to the voting process.”

Cuomo pressed on, asking, “Why would you say millions of people voted illegally? That doesn’t bring back confidence.”

“We need to modernize the system and make it accurate and believed by the American people,” Issa concluded. “That’s all Donald Trump is getting America thinking about.”

Democratic congressman Jerrold “Jerry” Nadler appeared on “New Day” during the next segment. CNN’s Alisyn Camerota asked for his response to Issa’s claims that huge numbers of Americans voted illegally.

“Prove it,” Nadler responded. “I don’t believe a word Darrell Issa ever says.”