Hillary Clinton is leading Barack Obama by almost 3-to-1 in West Virginia, according to an American Research Group poll conducted May 7-8. Do you need to know the margin of error? O.K., it’s 4 percent. Clinton has 66 percent to Obama’s 23 percent with 6 percent undecided and 5 percent preferring someone else. Among White voters, who make up 93 percent of the sample, Clinton leads 70 percent to 19 percent while Obama has a 91 percent to 3 percent lead among black voters who make up 5 percent of the sample.
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