Joe Biden (left) and Donald Trump (right).Chris Szagola/AP images, Evan Vucci/AP images, Tyler Le/BIPresident Joe Biden indicated he would be fine losing to Trump as long as he put up a good fight.The 81-year-old president made the comments during his first post-debate interview on Friday.Biden continues to present a defiant front even as concerns about his candidacy mount.President Joe Biden suggested he would be OK losing to former President Donald Trump in November "as long as I gave it my all" — undercutting the heart of his 2024 presidential platform as concerns about his candidacy continue to grow.On Friday, the 81-year-old Biden sat for his first interview since his disastrous debate performance last week, speaking with ABC News's George Stephanopoulos and attempting to assuage doubts about his fitness for office, including increasing anxiety from within his own party.Biden has long positioned himself as the best bet to protect American democracy from another four years of Trump.