For the first time since 1892, two candidates who have served as the U.S. president will likely be facing off as the top candidates in the 2024 presidential election. The race between Donald Trump and current President Joe Biden is less than six months away and expected to be close. What Happened: Election polls and betting odds point to a close matchup between Biden and Trump, which could leave the presidency to be determined by items such as voter turnout, young voters and swing state voters. A new poll of voters in swing states shows Biden gaining ground over Trump, who has led in these key…