John Roberts reported the latest this morning on the possible replacements for Gen. Michael Flynn (Ret.) as President Trump's National Security Adviser.

Flynn resigned late Monday amid a controversy over his conversations with the Russian ambassador before Trump took office.

Flynn acknowledged "inadvertently" misleading VP Mike Pence when he maintained that new sanctions on Russia, imposed by the Obama administration, were not discussed.

Pence and Press Secretary Sean Spicer repeated those denials publicly. Multiple reports last week indicated that the sanctions were discussed in the phone calls. 

As far as the possible replacements for Flynn, Vice Adm. Robert S. Harward (Ret.) and Gen. David Petraeus (Ret.) are seen as the leading contenders. 

Harward served as deputy commander at CENTCOM under Gen. James Mattis (Ret.), who is now the defense secretary.

He is a former Navy SEAL who served in Iraq and Afghanistan commanding special operations. Harward served on President George W. Bush's National Security Council and was assigned to the National Counterterrorism Center in 2005.

If he gets the position, he could start on the job as early as Friday, said Roberts, describing Harward as the leading contender.

He said former CIA Director Petraeus is also in the mix for the cabinet post. Gen. Keith Kellogg is serving as acting national security adviser until a permanent choice is named. 

Watch the "America's Newsroom" report above.

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