As of this writing (Saturday August 20), Real Clear Politics has Democratic challenger Katie McGinty up by an average of about 2.5 points.
Pat had been leading in the polls until the end of June. Solidly leading in the polls. By the time the GOP convention was over (July 21) the numbers began to shift, if I am reading them correctly.
Since then, since Donald Trump's installation as the leader of his party, Pat Toomey has only won one Pennsylvania poll (Public Policy Polling - a slight right-leaner, according to Nate Silver) where he was up by 1%.
That's it, ever since Pat Toomey's been trailing in the polls.
Polls change, of course. But this still has to be something the incumbent Republican candidate has to be worrying about.
Then there's how this race fits into the national picture - for example, this piece (dated August 16) from Harry Eaton over at Nate Silver's Five Thirty Eight. In a discussion of the electoral situation following the GOP convention Eaton parks his argument right in the middle of:
Donald Trump’s post-conventions polling slump seems to be having an effect on the Republican Party’s U.S. Senate candidates. We thought this might happen: There’s been an increasingly strong relationship between how a state votes for president and how it votes for Senate over the past few election cycles. And, indeed, Trump’s tumble has coincided with worsening GOP numbers in key states. It may cost the party the Senate.And when we finally get to Toomey, there's this:
Republicans have also seen their prospects worsen in Pennsylvania. Trump is now down 10 percentage points in the state, a headwind that may be too much for Republican Sen. Pat Toomey to overcome. Toomey, like Ayotte, had been leading in most polls before the conventions. But he has trailed in four of the five polls conducted since the conventions. Toomey’s slide, in particular, should worry Republicans. He has made it clear that he is not a Trump fan and has avoided appearing with Trump when he visits the Keystone State. And yet, their fates still seem tied. It may be that down-ballot Republicans can only do so much to keep themselves from getting swept up in an anti-Trump tide.Toomey's non-endorsement isn't helping him. Toomey's non-appearances aren't helping him.
That's got to be worrying Pat.