caracas venezuelan president nicolas maduro approval rat rise 23 percent september percentage point 17 percent july accord poll local firm datanalisis rebound follow several round sanction u.s. president donald trump administration well sharp drop-off four months violent anti-government protest nearly 52 percent respondents oppose trump administration sanction come response creation legislative superbody call constituent assembly critics call consolidation dictatorship fifty-seven percent say disagree unite state use military option push change venezuela reference trump comment august meet condemnation around region maduro low approval unusual latin america presidents juan manuel santos colombia michel temer brazil show low poll number year maduro popularity fall since narrowly elect 2013 follow death late socialist leader hugo chavez decline largely result economic crisis drive triple-digit inflation soviet-style shortages opposition say crisis result fail socialist model rampant corruption maduro blame situation economic war opposition support washington poll survey 1,000 people sept. sept. 22 show 86.9 percent respondents believe country situation negative survey margin error 3.04 percentage point venezuela 's maduro approval rise 23 percent trump sanction poll