"They" are whom John F. Kennedy asked the press for help in alerting and informing the American public about. Because "they" have been waging a conspiracy against us since 1913. "They" are the owners of the Federal Reserve, a private for profit company that has absolutely nothing to do with the US Federal government. "They" control the USA because "they" are in charge of issuing America's currency, something the founding fathers warned us to never allow.
"For we are opposed around the world by a monolithic and ruthless conspiracy that relies on covet means for expanding it's sphere of influence, on infiltration instead of invasion, on subversion instead of elections, on intimidation instead of free choice, on guerrillas by night instead of armies by day. It is a system which has conscripted vast human and material resources into the building of a tightly knit, highly efficient machine that combines military, diplomatic, intelligence, economical, scientific and political operations. It's preparations are concealed not published, it's mistakes are buried not headlined, it's dissenters are silenced not praised. No expenditure is questioned, no rumor is printed, no secret is revealed....I am asking for your help in the great task of alerting and informing the American public" John F. Kennedy, "The President and the Press" speech made in April 1961.
https://m.youtube.com/watch?v=RhkjYJAHCjM&list=LLDaYJhsWtNefoYPlCgMeCZA&index=1