Sliwa has been fighting crime in the city for decades as the founder and head of the Guardian Angels.
He will face off against Democratic mayoral candidate Eric Adams in November.
Meanwhile, a surge in new COVID cases is exploding among unvaccinated Americans.
But there have also been more reports of so-called breakthrough cases, where some people who were vaccinated are getting infected.
This morning we talk to an emergency room physician who discusses what we should do now.
Also, our political team discusses President Biden and his effort to get crucial components of his economic to-do-list voted on and started.
WATCH Up Close on our Connected TV apps for Fire, Roku, Apple TV and Android TV. Click here to learn more.
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Up Close with Bill Ritter airs Sunday mornings at 11:00 on Channel 7.