MOSCOW (Sputnik) — On Thursday, Trump told Reuters news agency that the United States was going to be "at the top of the pack" in terms of nuclear capacities and would never "fall behind on nuclear power."
"Trump's words on the expansion of the US nuclear potential challenge strategic arms reduction treaties, throwing the world back into the 20th century," Pushkov wrote on his Twitter.
"This [stability] should be preserved," the lawmaker wrote.
Trump also reportedly said that he does not support the New Strategic Arms Reduction Treaty (START) with Russia.
In 1972, the Soviet Union and the United States signed Strategic Arms Limitation Talks Agreement, or SALT I, which capped the number of ballistic missiles at the existing level.
Both Russia and the United States are also parties to the international Treaty on the Non-Proliferation of Nuclear Weapons, whose aim is to prevent the spread of nuclear weapons and relevant technology.