More Democratic superdelegates are boycotting their party’s convention in North Carolina amid fears that any association with President Barack Obama will doom them to defeat in November.

Representatives Kathy Hochul and Bill Owens of New York, who both won special elections in seats previously held by Republicans, have joined four Democrats from the Rust Belt in skipping the Democratic convention in Charlotte at the start of September.

Rep Hochul told The Daily: ‘I guarantee that my time will be better spent meeting the farmers, small business owners and other people who put me here.’