chilmark mass declare tire talk donald trump president barack obama urge democrats monday grow confident prospect 2016 election despite hillary clinton strong position race white house obama two-week vacation martha vineyard island coast massachusetts take short break relaxation time raise money clinton democratic presidential nominee hop succeed leave office january clinton lead trump opinion poll republican nominee campaign suffer follow remark make denigrate parent fall muslim american soldier charge obama founder islamic state militant group president warn party however maintain sense urgency nov. election run scar day election go make grave mistake obama tell 60 donors contribute 10,000 attend fundraiser private home island job hillary elect president unite state job still possible lose remark could foreshadow president role fall encourage get-out-the-vote efforts clinton former secretary state obama make clear disdain trump call unqualified white house tell donors tire talk clinton rival make case opponent every time talk make case candidacy obama say president expect campaign heavily clinton october obama warn democrats overconfidence clinton victory