The phrase "as the core problem" is correct and usable in written English.
It can be used when identifying or emphasizing a central issue or challenge in a discussion or analysis.
Example: "The lack of communication among team members is identified as the core problem affecting project success."
Alternatives: "as the main issue" or "as the fundamental problem".
The "5 plus 1" group (the United States, Britain, France, China, Russia and Germany), however, sees Iranian enrichment as the core problem.
Christie Whitman, a former Republican governor of New Jersey and Environmental Protection Agency administrator, pointed to social issues as the core problem in the polarization of American politics.
It identifies the coercive imposition of competition by a centralised state as the core problem, and contains the most succinct definition of neoliberalism in the English language: "the disenchantment of politics by economics".
At a stroke, this has breathed new life into hopes of ending the very conflict which critics of his Iraq policy routinely describe as the core problem of the Middle East and the fount of Islamic terrorism.
There was much debate but it did little to diminish what critics perceived as the core problem.
Still in Melka Jebdu (Kebele 01), capital persists as the core problem for youth not to involve on self-employed businesses.
There are two schools of thought as to the core problem that lies ahead.
This is in accordance with other studies referring to fragmentation of care time and increasing time pressure as the core problems facing HCWs [ 14].
But they are excuses and the core problem as to why this bloody conflict has lasted so long.
And that, for Mr. Draghi, is the core problem, as frenetic buying and selling by foreign investors sustains a broad climate of fear and uncertainty in the market.
The core problem, as it was three years ago, is too much debt that borrowers are having a hard time repaying — but this time it is government debt rather than consumer debt.
