The "occupied territories" refers to the West Bank and East Jerusalem, where Palestinians live and where there is an Israeli military presence. The Israeli government and many of its supporters believe Israel has a right to the land. The United Nations refers to the land as the Occupied Palestinian Territories.
The remark was looked upon as a gaffe because the Republican Jewish Coalition is unwaveringly pro-Israel in its foreign policy. Adelson is a stalwart supporter of Israel and wants his candidates to be the same.
While candidates were looking to make an impression with all the potential donors, there is no doubt that Adelson was being courted. He hosted the event at his casino, the Venetian, and some dubbed the weekend the "Sheldon Primary."
The candidates speaking before the group, including Christie, Ohio Gov. John Kasich and Wisconsin Gov. Scott Walker, have little foreign policy experience. But each spent time reaffirming support for Israel.
Christie's comment may all be in the past. According to Politico, he apologized to Adelson, saying he misspoke and reaffirming his support for Israel. And according to reports, Adelson was front and center for Christie's speech, unlike for others.