The phrase "a wide margin and" is correct and usable in written English.
It can be used when discussing the extent or degree of something, often in contexts like comparisons or measurements.
Example: "The candidate won the election by a wide margin and secured a significant number of votes."
Alternatives: "a significant margin" or "a large gap".
Moody's, Standard & Poor's and Fitch dominate the rating industry by a wide margin, and their products have become an integral part of the financial world.
The doctors lost by a wide margin, and the tax was overturned.
The Liberal-National coalition won the vote by a wide margin, and Abbott became prime minister.
They outshot the Bruins by a wide margin and had the better scoring chances.
On primary day, Long won by a wide margin and immediately took to signing his correspondence "Governor and Senator-elect".
In the third quarter Google missed analysts' expectations by a wide margin, and its results were accidentally leaked hours early.
Demirbaş had just been reëlected, by a wide margin, and the national attitude toward the Armenian minority and toward the genocide was slowly beginning to soften.
The Rangers were already outshooting Dallas by a wide margin, and Shanahan added spice to what should have been a victory.
As early results showed the yes campaign had won by a wide margin, voters and observers marked the occasion with ebullient tweets, as well as celebrations at home, at counts and in the streets.
It was by such a wide margin the best and most welcoming atmosphere all weekend, and the curation from start to finish on point (Claire Morgan into Honey Dijon was the stuff of legends).
It is suggested that it is not enough for Donald Trump to simply lose; instead, he must lose by a wide margin--and, we are further told, that if this sort of defeat of Trump does not take place, it is our fault and not the fault of Hillary Clinton, the Clinton campaign, or the Democratic Party.
