The US defence spending are more than what the next eight most powerful countries in the world spend

President Trump wants to increase U.S. defense spending by $54 billion, that's a 10% increase to the US current defence budget which stands at arounf $550 billion.

His proposal, if approved by lawmakers, would push the U.S. defense budget up to $603 billion next year, $603 billion for a country that has no natural enemies, nor any threats to its borders. Now if that's no enough, that amount doesn't include any extra defense spending presidents ask for through supplemental requests during the year to cover overseas contingency operations, emergencies and disaster relief. Typically, that adds another $60 billion to $70 billion a year to federal outlays.

So all told, if Congress approves the president's request along with his expected supplementals, defense could account for about 16% of what the Congressional Budget Office estimates will be a $4 trillion federal budget in 2018. Just to put this in perspective, that increase alone is roughly the size of the entire annual military budget of the United Kingdom, the fifth-largest spending country, and it’s more than 80 percent of Russia’s entire military budget in 2015.

In 2015, the United States accounted for 36% of all military spending worldwide, according to the Stockholm International Peace Research Institute.

That's about the same as what the next eight countries spent altogether: China (13%), Saudi Arabia (5.2%), Russia (4%), U.K. (3.3%) India (3.1%), France (3%), Japan (2.4%) and Germany (2.4%). (The analysis excludes countries that do not release any official data.) U.S. military spending has been at permanent wartime levels since the 2001 terror attacks, despite the significant drawdowns in Afghanistan and Iraq under President Obama. Spending has declined since the wars were at their peak in 2010, but U.S. military spending in 2015 remains at 190 percent of what it was before 9/11. Broadly speaking, President Trump has said his military priorities include buying more warships and warplanes, increasing the number of American ground troops and Trump has also called for the U.S. to “greatly expand” its nuclear weapons capabilities, signaling a potential willingness to expand a $1 trillion modernization effort Obama started that was already widely criticized by budget critics as unaffordable. Source: https://www.sipri.org/research/armament-and-disarmament/arms-transfers-and-military-spending/military-expenditure