Some Republicans saw the removal of Iraq's Saddam Hussein as a necessary step, while others said the U.S. should have focused on its own problems.
"Princess Buttercup would not like this," the U.S. senator from South Carolina said, referring to a character from his GOP rival's favorite film.
During Tuesday's GOP "undercard" debate, the former governor of New York characterized Russia's president as a bully who needed to be put in his place.
As Russian and U.S. officials meet to discuss the wars in Syria and Ukraine, the Kremlin has taken a step back on human rights.
The countries are at odds over Syrian President Bashar Assad and the conflict in Ukraine but agree that the terrorist organization must be destroyed.
The new International Space Station crew launched from the Baikonur Cosmodrome in Kazakhstan early Tuesday morning.
The U.S. secretary of state met Russian Foreign Minister Sergey Lavrov Tuesday, to narrow divisions over Syria, Ukraine and the fight against ISIS.
The U.S. secretary of state on Tuesday will raise concerns about Russia's bombing of Syrian opposition forces instead of ISIS militants, a U.S. official said.
An agreement between Russia and the U.S. over the fight against the Islamic State group in Syria never included sharing of intelligence, the Pentagon has said.
As Russia's economy suffers from low oil prices, the Kremlin is still planning to modernize its forces with a focus on naval and air power.
A senior Russian defense ministry official said the operation will be performed from Monday through Friday along an agreed route.
Egypt announced Monday that it had found no evidence of any “illegal or terrorist act” in the downing of a Russian plane in October that killed over 200 people.
Despite its membership to the European Union, Lithuania imports 75 percent of its electricity from Russia.
The incident is likely to heighten tensions between the two countries, which are at odds over Syria and the Turkish shooting down of a Russian military jet last month.
Authorities believe that a wiring malfunction could have caused the tragedy that killed at 21 people and injured nearly two dozen.
President Xi Jinping skipped the main event that marked the alleged killing of 300,000 Chinese people by Japanese troops in 1937.
Dozens were killed or wounded in Homs just days after rebels pulled out of the city in central Syria under a truce. ISIS claimed responsibility.
The groups called for a resignation of Syrian President Bashar Assad, whom Russia has supported.
The Ukrainian Parliament's latest fistfight broke out Friday as the country's prime minister faces increased pressure to step down.
German authorities have said the Paris terror attack suspect could be in Morocco.
The aircraft was not immediately identified, but the incident follows Russian encroachments on several neighbors' territories.
Russian President Vladimir Putin also ordered the country's armed forces to act in an "extremely tough way" in Syria to protect Russian forces fighting against ISIS.