Boris was born in New York, so he could actually be a VP.
Boris is ineligible to be POTUS due to the last clause in Article II Section 1. He needs to be a US resident for the last 14 years.
Age and Citizenship requirements - US Constitution, Article II, Section 1
No person except a natural born citizen, or a citizen of the United States, at the time of the adoption of this Constitution, shall be eligible to the office of President; neither shall any person be eligible to that office who shall not have attained to the age of thirty-five years, and been fourteen years a resident within the United States.