US: Trump trailing in nearly all of the swing states - BBH

Research Team at BBH, suggests that the US presidential polls typically become more accurate after Labor Day and a change among the top Trump campaign managers has corresponded with what appears to be a small bump in the polls. 

Key Quotes

“He is trailing in nearly all of the swing states, and a few states that are regarded as safe for Republicans appear in play now. This week there are two primaries that will draw attention.  In Arizona, former GOP-nominee McCain faces a primary challenge.  In Florida, former chair of the Democrat Party, Wasserman-Schultz is also in a primary contest.  Both incumbents are expected to win.”