CBS reschedules shows with terror storylines, while NBC and E! Network reschedule live shows that were to air on Friday.
The first Democratic debate in October averaged about 15.3 million viewers. Saturday's viewership fell by nearly half.
The number of injured in the attacks stood at 352, 99 critically.
Presidential candidates on both sides of the political aisle made the rounds on television talk shows Sunday to discuss what they believe the U.S. should do about ISIS.
The horrific attacks in Paris on Friday signal a major intelligence failure that could trigger a significant overhaul of international cooperation.
With the Paris attacks, social networks are taking aggressive stances against the Islamic State. “There is no place for terrorists on Facebook,” a representative said.
The two leaders huddled together before the opening session of the Group of 20 summit in the Turkish city of Antalya.
At small venues like the Bataclan, which don't always work with promoters that require strict screening, security may only check audience IDs — leaving artists and concertgoers alike extremely vulnerable.
The actions came as the country entered three days of official mourning for the 129 people slain in coordinated attacks by members of the Islamic State group Friday.
Seven Syrians are among the nine people arrested on suspicion of involvement in the Beirut bombings Thursday.
In some of those cases, authorities have been able to provide only partial identifications.
U.S. public opinion already is divided on Syrian refugees, but the Paris attacks are heightening fears about accepting them into the country.
The man, identified by Serbian authorities only by his initials A.A., came into Europe through the Greek island of Leros
French police Sunday sought at least one more suspect in Friday's terrorist attacks in Paris, following the discovery of an abandoned car with several AK-47s inside.
The attacker reportedly targeted a foreign military convoy in the southern province of Helmand.
French Interior Minister Bernard Cazeneuve had asked for the meeting.
Tourism and related industries may take a hit while so-called safe havens like Treasurys could get a bump.
In recent weeks, Iran's powerful hardline Islamic Revolutionary Guards Corps has rounded up a number of artists, journalists and U.S. citizens.
U.S. President Barack Obama vowed to help hunt down terrorists behind Friday's Paris attacks, at a news conference ahead of the summit in Turkey.
The comments came after 129 people were killed in Paris on Friday by gunmen and suicide bombers in an attack claimed by Islamic State.
Experts say French security services are already stretched thin after reportedly following some 6,000 people in the aftermath of the Charlie Hebdo attack earlier this year.
Washington already expects France to retaliate by taking on a larger role in the U.S.-led coalition’s bombing campaign against Islamic State.
GOP presidential candidates strongly criticized President Barack Obama's foreign policy, calling Saturday for the U.S. to take a stronger stance against ISIS.
An image of a popular anti-Gamergate critic was manipulated to make him look like a suicide bomber and then circulated on social media.
However, her rival Bernie Sanders received a lot of support in post-debate polls.
Democratic candidate and Vermont Sen. Bernie Sanders called Hillary Clinton's plan to regulate Wall Street "not good enough."
French President François Hollande declared a nationwide state of emergency in France for the first time since the 1960s by using a controversial law.
The CBS-hosted debate was supposed to focus on economic issues but was overhauled at the last minute to focus on national security after ISIS attacked Paris.
The Democratic contenders hold somewhat divergent views on leading economic issues.
A day after more than 120 people were killed in Paris, major questions are unanswered after the worst terrorist attack in Europe in 11 years.