The Air Force wants to spend the same on upkeep for the F-35s as it does for support on its fourth-generation fighter jets.
US Ambassador Nikki Haley told countries at the United Nations on Wednesday that they need to "step up."
The Trump administration has more than $200 million in new construction teed up for Guantanamo this year and next.
President Donald Trump is floating the idea of using the military's budget to pay for his long-promised border wall.
The president said he had "no choice" but to sign the bill, because the nation needs to fund the military.
President Donald Trump signed a $1.3 trillion spending measure Friday, averting a midnight government shutdown.
New rules to prevent the VA from conducting medical experiments on dogs was tucked into a massive spending package.
Congress gave final approval Friday to a giant $1.3 trillion spending bill that ends the budget battles for now.
The $1.3 trillion spending package includes a new provision that would give more veterans access to mental health care.
The military would get more ships, planes, tanks and a pay raise out of the proposed budget.