Putin responded to Trump's Thursday-night tweet during his year-end, hours-long press conference.
"Of course the U.S. has more missiles, submarines and aircraft carriers, but what we say is that we are stronger than any aggressor, and this is the case," Putin said. "As for Donald Trump, there is nothing new about it, during his election campaign he said the U.S. needs to bolster its nuclear capabilities and its armed forces in general."
Putin said Russia was not seeking to create more nuclear warheads or to enter a Cold War-era arms race. He said Russia was working to improve current armament to the point it could pierce through missile defense systems.