Mitt Romney, the presumptive US Republican presidential nominee, has left a troubled visit to London behind him and is now looking to rebound in Israel, whose ties with the US have been a familiar theme during his election bid.
Romney arrived in Israel late on Saturday on the second leg of an overseas trip aimed at bolstering his foreign policy credentials in his race to unseat Democratic President Barack Obama in the November 6 election.
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The trip has been beset with difficulties from the start, when he raised British hackles by questioning whether London was ready for the Summer Olympics, a statement he was forced to walk back after a rebuke from Prime Minister David Cameron.
The former Massachusetts governor hopes to find fairer sailing winds in Israel by returning to a familiar issue in his campaign, pledging stronger ties between the US and Israel if he is elected.
Romney and conservative Israeli Prime Minister Binyamin Netanyahu are old friends, and they will meet on Sunday before Romney gives a speech.
His visit coincides with a Jewish fast day that commemorates tragedies that have befallen the Jewish people.
Romney will meet Salam Fayyad, the Palestinian Authority prime minister, but his visit is centered mostly on Israeli leaders.
Romney carried with him a tough message on Iran's nuclear programme with senior national security aide Dan Senor saying the presidential candidate believes the threat of Tehran developing a weapon should be handled aggressively.
"He [Romney] believes there should be zero tolerance for uranium enrichment as it relates to Iran," Senor said.
"He believes that the threat of military action has to be credible in the eyes of the Iranian leadership.
"The only kind of deal [with Iran] that is acceptable to him involves zero uranium enrichment. And we can and should be deploying tough sanctions.
"There are tough sanctions in place. We can put in place tougher sanctions."
As for the possibility of a unilateral Israeli strike on Iran's nuclear facilities, which the Obama administration has sought to avoid, Senor told reporters on Romney's plane that the candidate believes Iran developing a nuclear weapons capability is an existential threat to Israel and a threat to the US, as well.
"Like-minded countries should work together, partner together in addressing that threat head on," the aide said.
"He's always said if Israel believe it needs to take measures to defend its country, protect its country, he would be supportive."
Romney will end his trip on Monday by taking in cash from a crowd of mostly Jewish Americans who live in Israel.
The fundraiser, scheduled for a Jerusalem hotel, has been declared off limits to the news media by the Romney campaign. Officials gave no explanation for the decision.
The campaign had kept finance events closed to the press for months, but in May began allowing a pool of reporters into fundraisers that are at public venues like hotels, while keeping closed those at private residences.
The event is notable in that one of the attendees is expected to be Sheldon Adelson, a Las Vegas billionaire who had
helped bankroll a political action committee in support of Newt Gingrich, a Romney opponent during the Republican primary battle.
Adelson, a strong supporter of Netanyahu and eager to defeat Obama, has sent more than $10m to a similar group
operating on Romney's behalf.
Romney's visit to Israel carries political sensitivities for him as he seeks to carefully navigate the world of Middle East politics without violating his personal vow not to criticise Obama while on foreign soil.
He argues that Obama has loosened the normally tight bonds between the US and Israel by proposing in 2011 a
peace deal between Israel and the Palestinians that would return Israel to pre-1967 borders.
On Friday, Obama released an additional $70m in military aid for Israel, a previously announced move that appeared timed to upstage Romney's trip to Israel.