The day after 49 people were killed at a nightclub in Orlando, U.S. President Barack Obama called on the nation to make it harder for people who might be a threat to get guns -- just as he had after other mass shootings. Obama said, “We have to decide if that’s the kind of country we want to be. And to actively do nothing is a decision, as well.” But gun control proposals from Obama and others appear to have no better chance of passing Congress than they did after earlier mass killings. “It’s a good bet that Congress will continue” to do nothing on gun control, said Philip Cook, a professor at Duke University in North Carolina. The Republican Party controls Congress, and most of its elected officials oppose new gun control bills, he said. The weapon used in the Orlando nightclub shootings was a Sig Sauer MCX rifle. It is a version of the AR-15 rifle and similar to the M-16 weapon used by the U.S. military. Military-style weapons have also been used in other mass killings, including the killing of 14 at San Bernardino, the murder of 20 first graders and six adults at an elementary school in Newtown, and the killing of 12 at a movie theater in the state of Colorado.