President Barack Obama addressed how the U.S. will confront terrorism on Sunday night, but Republican presidential candidates have criticized him for not doing enough.

During a primetime address from the Oval Office, Obama's address comes after 14 people were shot and killed in San Bernardino, California, on Dec. 2. He noted the victims ranged from white to black to Asian and Latino, some American-born and others immigrants.

Obama said there is still no evidence the shooters were directed by an overseas terrorist organization or a domestic conspiracy.

"But it is clear that the two of them had gone down the dark path of radicalization, embracing a perverted interpretation of Islam that calls for war against America and the West," said Obama. "They had stockpiled assault weapons, ammunition, and pipe bombs. So this was an act of terrorism, designed to kill innocent people."

The president defended himself in confronting terrorism on a daily basis since assuming office, and reiterated that the Islamic State militant group, also referred to as ISIL and ISIS, will be destroyed as well as other organizations that threaten the U.S. He reiterated that the U.S. has ongoing airstrikes in Iraq and Syria, continuing training and equipping "tens of thousands" of Iraqi and Syrians to fight ISIL with Special Operations Forces and disrupt the militant group's plots, finances and recruitment.

As Latin Post reported, the Obama administration announced it has enhanced the U.S. visa program, specifically the 38 countries that participate in the Visa Waiver Program (VWP). During Sunday night's address, Obama reportedly misspoke, but later clarified by the White House, about the Department of State and Department of Homeland Security's review of the VWP, which he said the female shooter utilized to enter the U.S.

Obama also called on Congress to pass legislation that would prohibit people on the no-fly list from purchasing a gun, stronger screening process for anyone entering the U.S. without a visa and to pass the Authorization for Use of Military Force (AUMF).

"I think it's time for Congress to vote to demonstrate that the American people are united, and committed, to this fight," said Obama.

Following his address, Sen. Marco Rubio, R-Fla., criticized Obama for not previously taking the Islamic State militant group's threats seriously.

"[Obama] announced nothing new other than we need gun control, even though it would have done nothing to prevent the attack in California. We need to prevent people on the no-fly list from buying these weapons, even though there are people that work for DHS that are on the no-fly list," said Rubio. "By the way, these individuals that conducted this attack would not have been prevented from accessing their weapons."

Rubio said he will consider ground troops to combat the Islamic State militant group, although he has not determined a set number of troops -- pending on recommendations from military officers.

Fellow Republican presidential candidate Ted Cruz said, if he's elected, he will direct the Department of Defense "to destroy ISIS" and will "will shut down the broken immigration system that is letting jihadists into our country."

In a statement, former Florida Gov. Jeb Bush said Obama has finally admitted that the threat of terrorism is not receding.

"We need to remove the self-imposed constraints President Obama has placed on our intelligence community and military, and we need to put in place an aggressive strategy to defeat ISIS and radical Islamic terrorism as I have proposed. Unfortunately, neither he nor Hillary Clinton has the resolve to put in place such a strategy. This is the war of our time. It should not be business as usual. We need a war-time Commander-in-Chief who is ready to lead this country and the free world to victory," said Bush.

Donald Trump was live tweeting during Obama's address.

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To read Obama's full speech, click here.
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For the latest updates, follow Latin Post's Politics Editor Michael Oleaga on Twitter: @EditorMikeO or contact via email: m.oleaga@latinpost.com.