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

Hou United

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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?