Oh my.

Via CBS News:

Heading into the two parties' conventions, the race for President is a dead heat, a change from last month when Hillary Clinton led by six points. Forty percent of registered voters now say they will back Clinton (a dip of three points), while 40 percent will vote for Trump (a bump up of three points). A month ago, Clinton led Trump 43 to 37 percent.

Most registered voters say they have made up their minds about who to support: 90 percent of Trump voters and 88 percent of Clinton voters say their choice is set. About one in 10 of each's candidates' supporter say their minds might change before the election.

The race looks essentially the same in a three-way contest when Libertarian candidate Governor Gary Johnson is added to the mix. He gets 12 percent of the vote, but Clinton and Trump remain tied, with 36 percent each.