(CNN) The battle lines have been drawn. On one side, President Donald Trump and his allies and enablers. On the other, Bob Woodward, hundreds of hours of taped interviews and dozens of sources and a book that reads as a comprehensive indictment of Trump's first 19 months in office.

So where do we go from here? Below, five storylines to watch over the coming days that may well determine who winds up with the upper hand in the fight over "Fear."

1. Can Trump disprove anything of consequence in the book?

What we saw late Tuesday was a series of coordinated denials by senior Trump staffers -- chief of staff John Kelly and Defense Secretary James Mattis -- designed to rebut hugely damaging portrayals of them as both afraid and dismissive of the President. But statements like those are sort of de rigueur in these situations. Broad denials that create straw men, knock them down and then suggest the matter is settled. If Mattis and Kelly didn't put out statements doing just that, it's hard to see how they could possibly remain in the administration for even one more day.

But what now? Trump tweeted Wednesday morning that the Woodward book "form[ed] a picture of a person that is literally the exact opposite of the fact." That is a big claim. Given Woodward's reputation -- as the preeminent chronicler of the modern White House -- and his long track record of fair and accurate reporting, the onus is on Trump to prove Woodward made major mistakes. And that means providing specific evidence of mistakes, not just saying the book is riddled with errors.

2. Will Republicans break ranks?

Time and again over his first year-plus in office, Republican elected officials have sought to ignore or downplay Trump's repeated unpresidential words and actions. They have played along with his construct that nothing is his fault and everything is the fault of the media and the way we cover him. Do Republican influencers keep up that solid front in the face of what -- knowing Woodward -- is almost certain to be a mountain of evidence (transcriptions of interviews, tapes etc.) that back up his book? Already, less than 24 hours in, cracks were showing. On Tuesday night, South Carolina Sen. Lindsey Graham called Woodward a "good reporter." And Ari Fleischer, former press secretary in the George W. Bush White House and someone who has demonstrated a willingness to defend Trump, tweeted this : "I've been on the receiving end of a Bob Woodward book. There were quotes in it I didn't like. But never once -- never -- did I think Woodward made it up. Anonymous sources have looser lips and may take liberties. But Woodward always plays is straight. Someone told it to him." The issue is not whether the Jeff Flakes and Ben Sasses of the world criticize Trump; they will. What matters is whether any of the leadership of the party -- or other members who have not previously voiced their issues with the President -- do so.

3. What else does Woodward have?

Remember that the actual book doesn't come out until next Tuesday. Yes, we've already heard some of the juiciest nuggets. But, this is a 400+ page book. Which means that there is a lot more in there. What is it? How does Trump react to it? How is it covered -- and for how long? The initial wave of Woodward stories is over. But the overarching story isn't done -- far from it. How long it goes and how bad it is for Trump depends heavily on what else Woodward has in the book and/or other damning audio like the sort he released yesterday of a recorded phone call between himself and Trump

4.Will the White House message change?

Trump is a notoriously unreliable messenger -- often saying one thing in an interview and contradicting himself in a tweet. Or offering a totally different version of events than the official White House readout of a situation. Remember how Trump fired then-FBI Director James Comey because of a memo that Deputy Attorney General Rod Rosenstein wrote? And then Trump admitted to NBC's Lester Holt that he was going to fire Comey regardless of the memo, while thinking "of this Russia thing with Trump."

We're already seeing some message dissonance from Trump. After spending most of Tuesday night and Wednesday morning disparaging the Woodward book as fake, Trump tweeted this at 9:20 a.m .: "Almost everyone agrees that my Administration has done more in less than two years than any other Administration in the history of our Country. I'm tough as hell on people & if I weren't, nothing would get done. Also, I question everybody & everything-which is why I got elected!" That sure as hell sounds like a confirmation that the rough treatment by Trump toward his staff as described in the Woodward book is accurate. Which raises the question of whether Trump actually thinks Woodward's book isn't true, is true in parts or is totally true and he's just saying stuff.

5. Will there be a big resignation or firing?