The phrase "as insistent as a" is correct and usable in written English.
It can be used to compare someone's insistence to that of something or someone known for being very persistent or demanding.
Example: "She was as insistent as a child asking for a cookie before dinner."
Alternatives: "as persistent as a" or "as demanding as a".
The deepest gulf between the two concerns Iran's nuclear ambitions, and Mr. Ghalibaf seemed as insistent as any other Iranian official in saying that his country neither sought nuclear weapons, as Western nations say it does, nor threatened its neighbors.
Young children are not, after all, as insistent as their elders that a story adhere to the rules of logic or the nature of reality.
As it happens, we're already, under the Obama administration, training some Syrian rebels in Saudi Arabia, at the behest of that longtime ally of the Bush family which is every bit as insistent as Israel in pushing an agenda for American action in the Middle East.
After a smoothly effective start, he was frequently made to suffer in the middle rounds, driven into the corners by an aggression as insistent as fire, hammered by left hooks of a ferocity that put his title seriously at hazard.
Though digitally rendered, they retain an appealing sketchy quality, and their bright primary colors are as insistent as wrapping paper is to a 3-year-old.
In "Koumpo," a masked harvest dance from Guinea-Bissau, an explosion of squatting, thudding dance as insistent as the drumming that accompanied it came to a momentary lull when the men sank unexpectedly and suddenly to a sitting position, one knee bent and wrapped with an arm.
Those who insist that Islam poses a threat to Europeans and Norwegians, and claim the past 1,500 years is a story of a never-ending clash between a Christian civilisation and Islamic barbary, are just as insistent as before.
There are universal vibrations that must be picked up at just this moment in histor They are as insistent as insects in the grass.
And as insistent as Edwards is -- making the rounds of the locker room, cautioning players to keep their egos in check -- the testimony of the members of that 2000 team could prove even more compelling.
