"widening consensus" is correct and usable in written English.
You can use it when you want to express that an opinion or a group of people are becoming increasingly unified in agreement on a particular issue. For example, "The widening consensus among citizens shows that they strongly support the new tax plan."
There seems to be a widening consensus that training physicians for leadership matters.
John Hawksworth, PwC's head of macroeconomics, said: "Despite the widening consensus around the need to decarbonise, few countries are doing enough to live within our estimates of their carbon budgets.
But a widening consensus is growing that the importance of such assets -- from brand names and customer lists to trademarks and patents -- means that investors need to know more about them.
These developments in turn helped to determine the current situation confronting philosophical anthropology, in which it must decide whether or not to join a widening scientific and philosophical consensus on these matters.
The more enlightened DC politicians realised that an alliance with the Socialist party would widen the political consensus and isolate the communists.
Of course, some variation is inevitable; but as the fault lines that criss-cross the country widen, finding political consensus becomes ever more difficult.In this section One nation, divisible An end to earmarks All economics is local Happy apple Targeting the boss An uncivil action Bluff and counter-bluff ReprintsIn one important respect America has a sunny demographic outlook.
Obama badly needs Hu's cooperation to widen the international consensus opposing Iran's nuclear adventurism.
Achieving a better outcome than the current one (which even lawyers think overly legalistic) might best be achieved through a convention like the one that built consensus for Scottish devolution, widening support for human rights in general.
Those minutes showed a consensus that it would "soon be appropriate" to begin widening the spread.
"By prevailing in conservative locales where they ordinarily would not have a chance, Democrats are widening the ideological divide in their own ranks and complicating their ability to find internal consensus".
Despite the widening chasm between these two sides, the purpose of the meeting was to reach a consensus and publish a "joint ministerial statement," and in preparation for this, negotiators had been desperately scrabbling to find common ground.
