On August 23, nMessage and the Maryland Republican Party released this gubernatorial poll: Democrat Anthony Brown 42%; Republican Larry Hogan, Jr., 41%; Libertarian Shawn Quinn 3%, undecided 14%.
When undecided respondents are asked if they lean to any particular candidate, the results are: Democratic 45%, Republican 42%; Libertarian 4%; undecided 9%. Here is a Baltimore Sun story about Quinn.
There are only three candidates on the ballot. The Green Party is ballot-qualified but chose not to run anyone for Governor. If Quinn gets at least 1%, the Libertarian Party will remain on the ballot for the 2016 election. No minor party nominee for Maryland Governor has polled as much as 1% since 1970, when the American Party received 1.97%. The only offices that count for retention are President and Governor. The Green Party is already circulating its 2016 party petition in Maryland. Thanks to PoliticalWire for the link.