Donald Trump's foreign policy speech has created expectations that he will match Marco Rubio's pledge to stand by the commitments made by President Bush to Israel's Prime Minister Ariel Sharon in Bush's letter dated 14 April 2004.
Rubio made his unequivocal pledge on 3 December 2015 at the Republican Jewish Coalition Presidential Forum during his unsuccessful race to secure the Republican Party's endorsement as its Presidential nominee:
"I will revive the common-sense understandings reached in the 2004 Bush-Sharon letter and build on them to help ensure Israel has defensible borders"