International efforts to ease Syria's crisis have been limited by divisions in the UN Security Council and a wariness about a military response, explains this Backgrounder.

As the United States winds down its decade-long war in Afghanistan, the two presidential candidates disagree on the pace of the U.S. withdrawal.

This CFR Issue Tracker looks at the United States' relationship with Pakistan and presidential candidates' stances on the issue.

Both presidential candidates vow strong support for Israeli security, with Mitt Romney criticizing the Obama administration for distancing the United States from Israel.

This CFR Issue Tracker looks at the United States' relationship with Russia and presidential candidates' stances on the issue.

With the strategic focus of the U.S. military in flux and the Pentagon's budget under significant scrutiny, this CFR Issue Tracker looks at the 2012 presidential candidates' positions on defense.

The economic climate and border security concerns have thrust the question of immigration reform into the spotlight in the 2012 presidential campaign.

Amid sluggish growth and high unemployment, the economy has emerged as the central issue of the 2012 presidential campaign, as the candidates debate the role of government in jumpstarting the economy and creating jobs.

U.S. President Barack Obama and Republican rival Mitt Romney accuse China of currency manipulation and unfair trade practices and support an expanded U.S. presence in Asia, but Romney dismisses the president's efforts as inadequate.

The presidential candidates generally agree on support for democracy and human rights in Arab states, but have differed on several policy particulars, such as military intervention in Libya and Syria.

President Obama is generally supportive of the UN mission while raising questions about its effectiveness, but GOP candidate Mitt Romney is harshly critical of the organization.

Both presidential candidates have called for expanding U.S. energy production to create jobs, even as they disagree over the role of government subsidies and environmental regulation.

Iran's nuclear ambitions have tended to dominate discussions in the U.S. presidential campaigns over nuclear nonproliferation.

President Obama has expanded sanctions against North Korea over its nuclear ambitions while making attempts to engage with it, but Mitt Romney has criticized the engagement policy as weak.

The expansion of North Africa's AQIM into Mali and links to attacks against the U.S. consulate in Libya have spurred fears about the group's threat to the region, explains this CFR backgrounder.

Many states and cities face significant fiscal stress that could impede the U.S. economic recovery and undermine long-term growth, including cuts to education and infrastructure, explains this CFR Backgrounder.

With the Occupy Wall Street movement now a year old, income inequality remains hotly debated globally. This Backgrounder examines the issues.

As Europe's central bank moves aggressively to staunch the continent's crisis, some critics are asking if it has exceeded its mandate by stepping into the breach left open by elected leaders.

U.S. presidential nominating conventions often touch on national security and foreign policy, but don't always signal the direction of a winning candidate's policy, explains this Backgrounder.

A profile of South America's largest trade bloc.