Chris Christie blasts Trump's 2024 presidential campaign as a 'vanity exercise' meant to 'try to make himself feel better'

• Ex-NJ Gov. Chris Christie on Sunday called former President Trump's 2024 bid a "vanity exercise."
• Christie argued on WABC radio that a Biden-Trump matchup would be "bad" for the GOP. 
• The former governor is mulling a 2024 campaign of his own and is set to make a decision this month.

Former Gov. Chris Christie of New Jersey on Sunday once again blasted former President Donald Trump's presidential campaign, calling the ex-president's 2024 effort a "vanity exercise to try to make himself feel better."