(TheBlaze/AP) — Last night’s presidential debate was, perhaps, one of the most contentious displays of political back-and-forth in decades — if not ever. While President Barack Obama and Republican candidate Mitt Romney discussed topics like immigration and the economy, there’s one subject that didn’t come up — but one that is sure to be mentioned in the final debate: Israel.

As concern intensifies over Iran’s nuclear program and the rise of Islamist governments in the Middle East, America’s top ally in the region, Israel, has become increasingly wary. It’s a known fact that Israel’s security has been a U.S. foreign policy priority of both Democratic and Republican administrations since the Jewish state was created in 1948.

This Is Why Israel Matters in American Politics | Obama, Romney, Netanyahu

U.S. President Barack Obama (R) speaks as Republican presidential candidate Mitt Romney (L) and moderator Candy Crowley (C) listen during a town hall style debate at Hofstra University October 16, 2012 in Hempstead, New York. Credit: Getty Images

Although small in size and population, the Middle Eastern nation has significant influence in Washington, and presidents of both parties have pledged their commitment to its defense. And it’s always a potential flashpoint in a region that the U.S. depends on for oil.

Where the Candidates Stand:

President Barack Obama has continued the U.S. tradition of strong support for Israel — however there have been some major bumps along the road. While some officials in both American and Israel say bilateral security cooperation is as strong as it has ever been, others disagree. Israeli lawmaker Danny Danon, for one, recently said that Obama has “not been a friend of Israel.”

This isn’t an isolated incident, either. The Obama administration has become embroiled in several very public spats with the government of Israeli Prime Minister Benjamin Netanyahu, stirring criticism that Obama is not fully backing Israel. And — who can forget Obama’s claim that Israel should return to its 1967 borders (a statement he later amended).

Republican presidential rival Mitt Romney has been sharply critical of Obama’s policy on Israel. Romney is friendly with Netanyahu, visited Israel in July and has vowed unreserved U.S. support for Israel.

Why Israel Matters:

America has historically supported Israel as a bulwark of stability and democracy in the world’s most volatile region and shares culture and values with the Jewish state. Israel has also been the United States’ most consistent ally in the Middle East. Because many politically-active American Jews and evangelicals rank Israel at or near the top of issues likely to influence their vote, Israel and its security are usually major election-year topics.

Israel sees a nuclear-armed Iran as a threat to its existence and the last three American presidents have stepped up pressure on Iran, which has threatened to wipe Israel off the map, to prove that its nuclear program is peaceful.

This Is Why Israel Matters in American Politics | Obama, Romney, Netanyahu

Israeli Prime Minister Benjamin Netanyahu speaks during his annual meeting with European Union member state ambassadors on October 16, 2012 in Jerusalem. Credit: AFP/Getty Images 

An Israeli attack on Iran, backed by the United States or not, could lead to retaliation from Iran and its proxies against Israel and perhaps Western interests. It could also set events in motion spiking oil prices. An Iranian attack on Israel would almost certainly draw the United States into a bloody regional conflict.

Presidents Bill Clinton, George W. Bush and Obama have all in turn tried to broker a two-state solution to resolve the Israeli-Palestinian conflict, which some believe would remove a main motivating factor for Islamist extremists who have targeted the U.S. and its interests abroad with terrorist attacks.

Romney, who has publicly wondered whether Palestinians truly want peace, has taken issue with Obama’s strategy in the peace process. He has criticized the administration for demanding that Israel freeze construction of Jewish housing on land that the Palestinians claim as part of their eventual state.

After initially rejecting such a step, Netanyahu announced a temporary freeze intended to bring the Palestinians back to the table. But the talks quickly broke down amid complaints the Palestinians weren’t serious about peace and Obama was putting too much pressure on Israel.

Related:

Israeli Lawmaker: Obama Has ‘Not Been a Friend of Israel’