Donald Trump, the presumptive Republican candidate, is just ahead of his likely Democratic rival President Joe Biden in key swing states, according to the results of a new IPSOS poll published on Thursday. The slight edge may have to do with voter discontent over the way the president has carried out his responsibilities, especially his handling of the economy, immigration and foreign relations. Trump Ahead, But … : When respondents from the seven swings states of Michigan, Pennsylvania, Wisconsin, Georgia, North Carolina, Arizona and Nevada were asked their choice for president, Trump holds a…