LONDON- Russian President Vladimir Putin's decision to seek another six years in power is raising concerns about the future of nuclear tensions with the United States.

As the clock ticks down on the last remaining treaty limiting warhead deployment, Putin has emphasized Russia's advanced nuclear capabilities. Despite denying a "brandishing" of nuclear weapons, Putin has elevated alert levels and deployed tactical nuclear missiles in Belarus.

Analysts suggest that nuclear weapons have gained significance for Putin amid struggles in Ukraine and weakened energy-based pressure on Western countries.

The Kremlin appears uninterested in reducing nuclear risks through dialogue with Washington, believing that maintaining a credible nuclear threat deters direct intervention in Ukraine.

Looking ahead, with less than two years until the expiration of the New START treaty in February 2026, prospects for an extension or a successor pact seem uncertain.

China's nuclear build-up adds complexity, and Putin's suspension of Russia's participation in New START reflects strained relations. Moscow demands a shift in the U.S.'s "fundamentally hostile course."

While Putin showcases Russia's new weapons, experts question the sustainability of an uncontrolled nuclear arms race given economic strains, technological restrictions, and sanctions. Some foresee a qualitative arms race, raising concerns about stability and bleak prospects for arms control.