Tomorrow, Hillary ClintonHillary Diane Rodham ClintonCan Biden encompass the opposition he embodied? Disney silent on Trump status in Hall of Presidents at Magic Kingdom Biden has an opportunity to win over conservative Christians MORE and Barack ObamaBarack Hussein ObamaBiden's chief aide says president wants teams, no rivals Where is the campus debate on immigration? Gerald Ford Foundation urges 'dignified' presidential transition MORE make it official — they're a team. Their epic battle lasted 17 months, not to mention how much sooner than that a rivalry was building as presidential campaigns were plotted. They will meet for the first time in a small town named Unity in New Hampshire, where Hillary upset the surging Barack on Jan. 8. It’s a state that also happens to practically be a second home to John McCain. In Unity, both Clinton and Obama received exactly 107 votes — kinda sweet, in a painful way. Yet the outcome there clearly foretold what would become the closest primary race in history, a near-draw.

With tensions running high, what can we expect in Unity tomorrow? How nice the two former foes will be, and how many compliments will spill forth, is not in doubt — they will be gushing. She needs her debts paid off, he needs her voters — all 18 million among critical groups of Latinos, seniors, Jews, women and the working-class voters, famously dubbed Reagan Democrats, whom McCain wants desperately.

But as they embark upon a new partnership, what lies ahead for Clinton and Obama? The lingering questions are numerous, and I listed them in my column this week. How can they repair the damage from a bitter contest packed with charges of racism and sexism ? How can the forgetting and forgiving have happened when the race ended three weeks ago?

So many questions.

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IS OBAMA TRULY AHEAD OF MCCAIN, AS ALL THESE NEW POLLS SHOW? ASK A.B. returns Monday, June 30. Please join my weekly video Q & A be sending your questions and comments to askab@thehill.com. Thank you.