I don't think her lead is short lived. Trump had a short lived advantage because he became the presumptive nominee first. Both candidates will gain voters through consolidation likely up through convention. I suspect Hilary will keep her lead through the conventions up to the first debate.
Trump will win this after the conventions and especially after the first debate. He is not going to have the kind of media attention he needs to drive the narrative until then. In the mean time the MSM will drive the narrative and define Trump as a racist sexist pig and Hilary as the protagonist who is trying to defeat him. Of course the MSM will overplay their hand and the absuditity of their narrative will be exposed and destroyed when the debates start and Trump is able to get the narrative back away from them and expose who Hilary really is and who he really is.
Also remember that it is summer, people are not thinking about elections right now, much more in vacation mode.
I totally TRUST an OANN poll over ANY OTHER!!!! These numbers are probably correct this IS within the margin of error!!! It is also summer you won’t start latching onto people’s attention until September!!! Trump WILL win in a landslide Americans are PISSED!!!!
I did a column herd on this yesterday. Since 1952, the June leader is less likely to wn. Dems are over polled an average of 22 points in the last elections.