Israeli Prime Minister Benjamin Netanyahu flew into Washington DC Sunday, a day before his scheduled first meeting with American President Barack Obama.
According to reporters on the plane from Israel, the prime minister's staff was tense as they crossed the Atlantic, in anticipation of a conflict that has been brewing for weeks between "Bibi" and his host.
Issues to be discussed include two existential threats facing the Jewish state: Iranian's panting pursuit of nuclear weapons, and the global demand that Israel surrender to the Palestinian Arabs the most treasured and strategically vital parts of its ancient lands.
Obama has acknowledged the former danger, but made the United States' opposition to Israel's use of military force to squash it.
Regarding the second threat, however, not only is the White House not withstanding it, it is leading the charge.
For Obama, the most desired outcome of their summit would be Netanyahu's embracing of the "two state solution."
America is requiring a concession of massive proportions; it would amount to nothing less than the the prime minister's signing away of his nation's right to, and control over, its most treasured historical lands and sites.
And it would further fuel the appetite of Israel's Arab foes, who see the establishment of Palestine as vital for facilitating the complete eradication of Israel.
According to officials accompanying Netanyahu, the Israeli leader's stance on this issue is clear.
In the face of dogmatic demands from the US, Europe, Russia, Egypt and Jordan, Netanyahu has resisted all efforts to get him to endorse the two-state solution.
What Israel will insist on - one unnamed member of the delegation told the media - is "Palestinian" recognition of Israel as a Jewish state, and the international community's effective recognition - and not merely the mouthing of it - of Israel's security needs and concerns.
Ynetnews suggested American officials were trying to project a softened attitude ahead of the meeting. The service cited one official as stressing that while the administration had no intention of creating hostilities, it expected Netanyahu to affirm his government's commitment to previous agreements, and to comply fully with the world's demand for a settlement freeze.
Just how adamant Obama's expectations are will emerge in the coming hours.