The phrase "a source of leverage" is correct and usable in written English.
It can be used when discussing an advantage or a means to influence a situation or decision.
Example: "The new technology serves as a source of leverage in negotiations, allowing us to secure better terms."
Alternatives: "a means of influence" or "an advantage point."
"We do millions of things in Afghanistan, and any of those things can become a source of leverage," he said.
North Korea's and Iran's leaders discovered through these examples that a full-blown weapons program could become, at a minimum, a source of leverage.
But Mr. Trump's advisers appear hesitant to do away with what they see as a source of leverage with Canada and Mexico.
Yet analysts said the threat of trade action could potentially be a source of leverage over China, North Korea's only major ally.
Mr. Trump, who has called deal-making his "art form," has used his unpredictability as a source of leverage in discussions with Europe, Canada, Mexico, Japan and elsewhere.
She saw her chance, saw a source of leverage and took it, but now her attitude toward him seems to be hardening into something that looks a lot more like hatred than desire.
But it stems from the Obama administration's deep frustration with Capitol Hill's use of the ceiling as a source of political leverage, both last year and this year.
An American diplomatic cable from 2005, made public through WikiLeaks, admitted that the potential loss of a visa is "a source of considerable leverage" and suggested this could be used to press Jamaica's then prime minister to act against corruption.
Those who do control access to livelihoods and assets have a source of political leverage over citizens that can be deployed to pressure or threaten voters in subtle ways".
He also consulted the school's official graduate-school manual, which gave him a major source of leverage.
But he has been buying T.W.A. bonds in recent months, analysts and traders said, giving him a potential source of leverage.
