Easily persuaded, convinced or manipulated(adjective)
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Use "persuadable" in a sentence
"First objective: to speak to so-called undecided swing voters, what we call persuadable voters, voters who may be leaning one way or another, but have not yet completely made up their mind."
"Organizers are especially interested in talking with 10 freshmen House members that a prominent Tea Party-affiliated group has identified as persuadable on the question of continued U.S. involvement in Afghanistan: Justin Amash MI-3."
"Organizers are especially interested in talking with 10 freshmen House members that a prominent Tea Party-affiliated group has identified as persuadable on the question of continued U.S. involvement in Afghanistan:"