Barney Frank should be asking why Barack Obama and John Kerry failed to endorse the commitments made in writing to the late Ariel Sharon by President George Bush on 14 April 2004 – overwhelmingly approved by the Congress – which stated:
1. “The United States is strongly committed to Israel’s security and well-being as a Jewish state. It seems clear that an agreed, just, fair and realistic framework for a solution to the Palestinian refugee issue as part of any final status agreement will need to be found through the establishment of a Palestinian state, and the settling of Palestinian refugees there, rather than in Israel.”

2.”As part of a final peace settlement, Israel must have secure and recognized borders, which should emerge from negotiations between the parties in accordance with UNSC Resolutions 242 and 338. In light of new realities on the ground, including already existing major Israeli populations centers, it is unrealistic to expect that the outcome of final status negotiations will be a full and complete return to the armistice lines of 1949, and all previous efforts to negotiate a two-state solution have reached the same conclusion. It is realistic to expect that any final status agreement will only be achieved on the basis of mutually agreed changes that reflect these realities.”

Republican Presidential candidate Marco Rubio to his great credit pledged to revive Bush’s commitment to Sharon on 3 December last:

“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,” he pledged.
http://www.jewishjournal.com/election2016/item/rubio_pledges_to_reinstate_bush_letter_to_sharon

Will the media pack ask the same question of all Presidential candidates – Republican and Democrat – during their campaigns to assume the mantle of President?

Indeed that is a frank question for Barney Frank to ask those in his party seeking the Presidential nomination.