Former Obama adviser Lisa Monaco on Monday issued a warning about the potential consequences of President Trump's travel ban.

"I joined a group of bipartisan national security officials to criticize this ban, both its predecessor and the current one, because I don't think from a national security encounter terrorism perspective, it gets at the problem," Monaco, the former assistant to President Obama for homeland security and counterterrorism, said on CNN's "New Day."

"And indeed, it could make it worse."

Monaco said the people aren't yet aware of the identities of the people who carried out the attack Saturday in London, which left at least seven people dead and dozens more injured.

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"But what we do know is the last two attacks before this one in Britain were conducted by British citizens. We also know that there has never been an attack in the United States since 9/11 by anybody from the countries that were listed in this ban," she said.

"So the bottom line is, it doesn't get at the problem that we're confronting here, which is, in many respects, inspired violence or home-grown violence."

Her comments come after Trump last weekend reignited debate over his travel ban in the wake of the London attack.

In a tweet on Saturday, Trump renewed his call for the courts to approve his revised executive order, which would temporarily bar nationals from six predominately Muslim countries from entering the U.S.

"We need to be smart, vigilant and tough," Trump said. "We need the courts to give us back our rights. We need the Travel Ban as an extra level of safety!"

On Monday, Trump further made clear the intent of the blocked travel ban, now being appealed to the Supreme Court.