The Senate Finance Committee is the legislative linchpin for much important legislation.
A linchpin had fallen out, and permitted one of the wheels to slide off.
Nathaniel Hawthorne -- From Twice Told Tales
She thought about something Hazel had confided to her a few nights ago: I think Jason is the linchpin to Hera’s whole scheme.
Rick Riordan -- The Blood of Olympus
The Pope used the head of Baphomet as the linchpin in his case against the Templars.
Dan Brown -- The Da Vinci Code
He testifies in District of Columbia Family Court a few times a month about what’s working in this equation, or failing, and he is a linchpin in some very tough decisions.
Ron Suskind -- A Hope in the Unseen
Something told Hazel he was the linchpin.
Rick Riordan -- The House of Hades
True, a lot of the less lovable minutes had been delegated to Elsa, their Jamaican nanny, who remained to this day the linchpin of their domestic life.
Nicholas Evans -- The Horse Whisperer
For centuries Meereen and her sister cities Yunkai and Astapor had been the linchpins of the slave trade, the place where Dothraki khals and the corsairs of the Basilisk Isles sold their captives and the rest of the world came to buy.
George R.R. Martin -- A Dance With Dragons
" Women are indeed a linchpin of the region’s development strategy.
Nicholas D. Kristof -- Half the Sky
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That ass, Pumblechook, used often to come over of a night for the purpose of discussing my prospects with my sister; and I really do believe (to this hour with less penitence than I ought to feel), that if these hands could have taken a linchpin out of his chaise-cart, they would have done it.