JD Vance, a former Marine, bestselling author, and senator from Ohio, has been chosen by Donald Trump as a potential vice-presidential candidate, embodying cultural conservatism, economic nationalism, and criticism of ongoing wars. Vance, known for his memoir 'Hillbilly Elegy,' rose from a tough upbringing to Silicon Valley ties and political prominence, aligning closely with Trump's base and views, potentially reshaping the Republican Party's future. Despite initial criticism of Trump, Vance has shifted to extreme conservatism, supporting anti-abortion policies and opposing progressive initiatives like tax breaks for electric vehicles, drawing attention to his polarizing positions. His selection signifies a departure from traditional Republican ideals, with implications for US politics and the GOP's trajectory.