Barack ObamaBarack Hussein ObamaMcCarthy: ‘No deadline on DACA’ Democrats will need to explain if they shut government down over illegal immigration Trump’s first year in office was the year of the woman MORE highlights his work on nuclear proliferation with Republican Sen. Richard Lugar (Ind.) in a new television ad that ties national security to U.S. global leadership.

In the ad, Obama tells voters that nuclear proliferation is the most significant threat to U.S. security. He also tells supporters that the U.S. was once "a beacon of light around the world" and that it must restore its leadership role to work with other nations in reducing the proliferation of nuclear weapons.

"We have to lead the entire world to reduce that threat," Obama says.

Obama promotes his work with Lugar to secure funding for nonproliferation efforts. The two began their push for funding in 2005; it was granted in 2007. Their initiative provided $48 billion for efforts to destroy conventional weapons stockpiles and locate and apprehend weapons of mass destruction.

Today's ad comes after Obama announced cooperation with Lugar on another initiative: the Indiana Republican's bill, introduced today with Sen. Joe BidenJoseph (Joe) Robinette BidenDemocrats will need to explain if they shut government down over illegal immigration Trump thinks he could easily beat Sanders in 2020 match-up: report Biden marks MLK Day: Americans are 'living through a battle for the soul of this nation' MORE (D-Del.), to triple non-military aid to Pakistan. Obama and Lugar serve together on the Senate Foreign Relations Committee, where Lugar sits as ranking member. Lugar has endorsed John McCainJohn Sidney McCainMcCain rips Trump for attacks on press NSA spying program overcomes key Senate hurdle Meghan McCain says her father regrets opposition to MLK Day MORE for president.

See the video below: