Even if trump did reach Duterte's count and thinks he's only just getting started, it's very likely he'll surpass Duterte because the United States has never been a signatory to the I.C.C., and doesn't recognize the court's jurisdiction. Neither do China, India and Russia.
The Court lacks universal territorial jurisdiction and may only investigate and prosecute crimes committed within member states, crimes committed by nationals of member states, or crimes in situations referred to the Court by the United Nations Security Council. The reason the ICC issued an international warrant against Putin is for the last reason -- that the UN's Security Council referred his crimes to the Court and so its prosecutor(s) filed.
... Established in 2002 under the multilateral Rome Statute, the ICC is the first and only permanent international court with jurisdiction to prosecute individuals for the international crimes of genocide, crimes against humanity, war crimes, and the crime of aggression.
The ICC is intended to complement, not replace, national judicial systems; it can exercise its jurisdiction only when national courts are unwilling or unable to prosecute criminals...
Putin became the first head of state of a U.N. Security Council Permanent Member to be the subject of an ICC arrest warrant....[42]
https://en.wikipedia.org/wiki/International_Criminal_Court
That last sentence is where we're probably at. Seems like the only way the court would take trump on is if the UN Security Council referred him to the ICC as it did Putin.
trump's willing to take the gamble on just getting started. It's likely, imo, that he'll die before he faces earthly justice of any kind.
Because it's unlikely, one can only hope he does.