WASHINGTON>> The top-ranking Republican on a Senate committee that oversees the military is calling for a “generational investment” in America’s defense, saying aggressive and significant spending increases are necessary to deter coordinated threats from U.S. adversaries such as Russia, Iran and China.

Sen. Roger Wicker told The Associated Press that he will seek an additional $55 billion in defense spending over the limits that were forged in the deal to suspend the nation’s debt limit a year ago. Wicker explained his position in global terms, saying there has “never been such a level of cooperation and coordination among an axis of aggressors” that aims to challenge U.S. dominance.

The plan lays down a significant marker for Senate Republicans as they enter into a new round of budget fights with Democrats in the heat of a closely fought election year. The White House has proposed $850 billion in defense spending, adhering to the debt limit deal by proposing a 1% increase from the previous year. That plan is unlikely to keep pace with inflation and would seek to reduce the military’s costs by retiring older ships and aircraft.

Wicker acknowledged it would be “a hill to climb” to convince Congress to break from the spending caps at a time of deep political upheaval. Washington is still grappling with divisions over support for Ukraine, the aftershocks of two long wars in Iraq and Afghanistan and a presidential election between two presumptive candidates — Biden and Republican Donald Trump — who espouse vastly different visions of America’s role abroad.

But Wicker, R-Miss., said the U.S. has no choice. “We would be very foolish on a national survival basis to adhere to that when it comes to national defense,” said Wicker, the ranking member on the Senate Armed Services Committee.

Although GOP defense hawks have long advocated for robust defense spending, Wicker’s plan goes a step further, calling for a broad shift in the U.S. defense posture that would amount to a reshuffling of national priorities. Under his proposal, the military eventually would consume 5% of America’s gross domestic product, or total economic output.

Defense spending when measured as a portion of GDP is about 3% and has been declining since the height of the wars in Afghanistan and Iraq. It has not reached above 5% since the early 1990s.

Back in the 1980s and early 1990s, Wicker said, “nobody took a chance against the United States because we were powerful enough to keep the peace. We are simply not anywhere near that right now.”

“I think that the fact that we’re in a new Cold War is self-evident,” he said.

Wicker’s full plan is laid out in a 52-page paper he has been working on for the past year. In it, he makes the case for a new generation of weapons, pointing to an aging American arsenal as Russia moves to expand its territory in Europe and China tries to show increasing dominance in parts of the Pacific.