Politics week in review: From fallout over a whistleblower's complaint to Elizabeth Warren's latest polling numbers

From a whistleblower's complaint against President Trump to the latest poll out of Iowa showing Senator Elizabeth Warren leading the pack of 2020 Democratic presidential candidates, this is the Politics Week in Review for Sunday, September 22. Publisher of The Federalist and host of "The Fray" on Sirius XM, Ben Domenech, joins CBSN with the latest.