Hillary ClintonHillary Diane Rodham ClintonSanders expected to announce exploratory committee next week Bernie Sanders records announcement video ahead of possible 2020 bid Overnight Defense: Trump declares border emergency | .6B in military construction funds to be used for wall | Trump believes Obama would have started war with North Korea | Pentagon delivers aid for Venezuelan migrants MORE has a 79 percent change of winning the White House in a general election matchup against Donald TrumpDonald John TrumpGillibrand backs federal classification of third gender: report Former Carter pollster, Bannon ally Patrick Caddell dies at 68 Heather Nauert withdraws her name from consideration for UN Ambassador job MORE, according to political analysis website FiveThirtyEight. 

ADVERTISEMENT

"We're kind of at halftime of the election right now, and she's taking a 7-point, maybe 10-point lead into halftime," Nate Silver, founder of the site, told ABC's "Good Morning America" on Wednesday. 

"There's a lot of football left to be played, but she's ahead in almost every poll, every swing state, every national poll." 

Clinton, the presumptive Democratic nominee, leads Trump, her Republican counterpart, by 6 points in a RealClearPolitics average of polls. She led Trump in all 18 national polls conducted so far in June that RCP logged.

"Both have a lot of room to grow ... but the last candidate to blow a lead this large was in '88, when Dukakis had a big lead coming out of the spring and summer and wound up losing of course to Bush," Silver said.

"One big lesson of this campaign is don't try to outthink the polls. Don't try to outthink the American public. Trump has never been ahead of Clinton in the general election campaign," he added.

"He did a great job of appealing to the 40 percent of the GOP he had to win in the primary, but that's a lot different than winning 51 percent of 100 percent."