How important is it for a politician to tell the truth about his or her personal history?

It’s a question Americans face daily, especially since the establishment news media seems solely preoccupied with overturning every stone or pebble in a presidential candidate’s individual background, endlessly snooping for the one scandalous tidbit of dirt (information) that could sway hypothetical voter x’s decision come next spring (the party primaries) or thirteen months from now in the national election.