Washington, DC [US], July 20 (ANI): Republican presidential candidate Donald Trump’s running mate, JD Vance, on Friday took a shot at US President Joe Biden, asking how he can remain in office if he doesn’t have the “cognitive function” to run for re-election. Taking to X, the Ohio Senator asked, “If Joe Biden doesn’t have the cognitive function to run for re-election, then he certainly doesn’t have the cognitive function to remain as Commander-In-Chief. How can any Dem pushing him to drop out of the presidential race, argue in good faith that he should stay on as POTUS?” His statement came as…