Poll: Americans don't think sanctions will stop Russia

45% would support economic sanctions, with about the same percentages of Republicans and Democrats in favor.

One of the concerns with tougher economic sanctions on Russia is that most Americans just don’t think tougher sanctions will work. Asked directly about the European Union’s discussion of increased sanctions, just 14% believe that tougher sanctions in general would prevent Russian aggression. 55% disagree. Republicans are particularly skeptical.