Donald Trump’s Pentagon chief moderated his stance to get the job but is now pushing for change in the name of high standards ...

President Donald Trump wants a national missile defense system like Israel's, but Sen. Mark Kelly, D-Ariz., raised doubts that it is viable.

Senator Mark Kelly reacts to news that Defense Secretary Pete Hegseth is ending a Pentagon program President Trump signed into law in his first term.

Sen. Mark Kelly prodded Secretary of Defense Pete Hegseth for more details on the "Golden Dome" missile defense system proposed by the Trump administration. Kelly questioned if some of Hegseth's ...

Democratic Sen. Mark Kelly of Arizona says President Trump's decision to strike Iran leaves the U.S. in a "dangerous" moment ...

Defense Secretary Pete Hegseth commented on why the U.S. doesn't have complete confidence thjat the Iranian nuclear site at Fordow is completely destroyed: KELLY O'DONNELL, NBC NEWS: Mr. President, ...

During his remarks in a Senate hearing today, Senator Mark Kelly got into a tense exchange with Pete Hegseth over President Trump's plan to build a "Golden Dome" missile defense system.

U.S. Sen. Mark Kelly cast doubt on “the physics” of a proposed nationwide missile defense system and urged Defense Secretary Pete Hegseth to seek a viability analysis from scientists, not ...