“It's hard for a president to give absolute authority to a vice president...It takes a great deal of confidence for a president to say: 'You do Iraq. You do Ukraine, Joe.'" Penn Biden Center for Diplomacy and Global Engagement tweeted, quoting Joe Biden as commenting on the partnership and trust he shared with the previous U.S. president, Barack Obama,

Joe Biden held the office of U.S. Vice President from 2008 to 2017, VOA reports.

Read alsoBiden urges int’l community to maintain unity in wake of Russian aggressionDuring this period, Biden visited Ukraine on numerous occasions and remained in constant contact with the Ukrainian authorities.

Joe Biden does not rule out a possibility for him to run for president in the next elections.