Trump’s poll numbers sink into death spiral on the one-year anniversary of his campaign’s start
Donald Trump (John Premble/Flickr)

It's been one year since Donald Trump took that fateful ride down the escalator at Trump Tower to announce his candidacy for President of the United States -- and his poll numbers are absolutely tanking despite the fact that he's seemingly locked down the Republican nomination for the presidency.

Here is a chart from Real Clear Politics that shows what's happened to Trump's polling averages ever since he got a brief boost after clinching his status as the presumptive Republican nominee:

[caption id="attachment_823000" align="alignnone" width="542"]Source: Real Clear Politics Source: Real Clear Politics[/caption]

What's particularly devastating about this from Trump's perspective is that his Democratic rival Hillary Clinton hasn't gained all that much in the past three weeks -- instead, it's mostly been about Trump spiraling downward.

How bad are Trump's poll numbers right now? This bad: None of the last seven polls released have him even cracking the 40% support barrier. In fact, the last poll that had him at 40% or higher was an Economist/YouGov poll that came out on June 5th -- and even then, Trump only garnered 41% of the vote.

Another thing to consider is that Hillary Clinton's top rival for the Democratic presidential nomination, Bernie Sanders, hasn't even conceded or endorsed her yet. If he does that at the Democratic National Convention in July, that might give her a further boost over Trump in the polls.