Unlike their Republican counterparts, the Democratic presidential candidates debating Tuesday come from very different places.

Former Secretary of State Hillary Clinton is the one-time frontrunner, now seeking to regain her hold on the field. Vermont Sen. Bernie Sanders is the challenger, seeking to continue his momentum. Former Maryland Gov. Martin O’Malley is the underdog, hoping to prove he’s got what it takes.

And former Virginia Sen. Jim Webb and Rhode Island Gov. Martin O’Malley are the long shots, trying to break out of the back of the pack.

TIME spoke with speech consultant Ruth Sherman, who works with candidates, business executives and celebrities, to get some tips on what each of the candidates needed to do Tuesday to set themselves apart. Here’s her advice.

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