Breitbart had known Bannon since 2004, per
Wikipedia. Bannon may have come on board anyhow but in a different role.
Would Bannon have come aboard at the level he did? I'm not sure, but we could see the outlet become much stronger.
I don't think you'd have seen the schism between Ben Shapiro's wing of the organization and the wing that Bannon ultimately led.
I think Breitbart would have given Trump hell over the Michelle Fields incident - probably prompting trump to fire Lewandowski and apologize. But he also would have recognized Trump was tapping into the Rust Belt in a way Romney was unable to.
But there is another theory - another possibility.
Suppose Breitbart took up the IRS/Tea Party scandal during the 2012 election?
At the time, Glenn Beck's TheBlaze.com had done two articles on possible IRS harassment:
http://www.theblaze.com/stories/2012/02/14/is-obama-using-the-irs-to-silence-opposition-voices/
http://www.theblaze.com/news/2012/0...llied-by-the-irs-clear-obvious-overreach/amp/
Suppose Breitbart ran with it? Brought in O'Keefe, Bannon, and a full-court press, maybe timing releases during the spring and summer of 2012 - with those allegations becoming the talk of Fox News, talk radio, the Washington Times, and other conservative media outlets?
Put it this way... we may completely butterfly away the Trump 2016 campaign as we know it because the President would be Mitt Romney.