Former Secretary of State John Kerry joined Dana Perino on "The Daily Briefing" on Wednesday to discuss a wide range of topics, including calls from many Democratic lawmakers for President Donald Trump to be impeached.

Kerry, the 2004 Democratic presidential nominee, cautioned his party that it would be a mistake to politicize the impeachment process.

"I think we have to be really careful and be very analytical about whatever evidence is there -- and it's not there yet," Kerry said. "The Mueller investigation really has to run it's course, and then you can make an evaluation."

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Kerry also weighed in on the situation in Syria, saying he agreed with Trump's decision to use force after the regime of Syrian President Bashar al-Assad used chemical weapons on civilians.

He added, however, that the "diplomatic initiative" is missing from Trump's Syria policy, which is problematic because there will not be a military solution to the Syrian Civil War.

As for Trump's decision to unilaterally pull out of the Iran nuclear agreement, Kerry said the president actually made it more difficult for the U.S. to deal with the Islamic republic.

Perino noted that there have been reports that Kerry has been telling Iranian officials to "wait out" Trump and restart diplomatic discussions when a Democratic president is in the White House.

"I think everybody in the world is sitting around talking about waiting out President Trump," Kerry said. "You've got our allies, remarkably -- the people that we've worked with the closest through the years -- who are sitting there saying, 'What's next?'"

Watch the "Daily Briefing" interview above.

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