MANCHESTER, N.H. — Campaigning for president in the small states with early primaries is supposed to be retail politicking, but gaffe-prone 2020 front-runner Joe Biden’s handlers are leaving nothing to chance, deploying a teleprompter to help him stay on message.

Appearing in here in Manchester, N.H., before a crowd of 400, Biden’s people rolled out a teleprompter despite the relative intimacy of the gathering.