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POLL: Which team has better chance to overturn 2nd leg deficit, DC or Seattle?

D.C. United and the Seattle Sounders both face daunting mountains to climb in the second legs of their respedtive MLS Conference Championship series.

United are down 3-1 to the Houston Dynamo heading into Sunday's match (4 pm ET, NBC Sports Network), and the Sounders are down 3-0 to the LA Galaxy ahead of Sunday's nightcap (9 pm ET, ESPN).

Which currently trailing side has the best chance to overturn its deficit?