The phrase "a connection existed" is correct and usable in written English.
It can be used to indicate that a relationship or link was present at a certain time in the past.
Example: "In the early stages of the project, a connection existed between the two teams that facilitated collaboration."
Alternatives: "a link was present" or "a relationship was established."
"If I had believed such a connection existed," he says, "it would have been a showstopper".
But he did not allow the merest possibility that a connection existed between a millennia of church-based hostility towards Judaism and the Nazi assault on the Jews.
Inside-Washington revelatinns in recent months, by Richard A. Clarke, Bob Woodward and others, suggest that neither President Bush nor anyone in his inner circle was able to find strong evidence that such a connection existed.
So long as a connection existed between the Eastern and Western empires, that is, till the overthrow of the latter, the name Novellae was given to the constitutions subsequent to the code of Theodosius.
To Bird, if such a connection existed, it made electrochemistry an important subject to study for biological reasons.
Lest anyone dismiss the link between bare feet and musical success, some experts who study feet insist a connection exists.
'I do not believe a connection exists, nor do I believe one will be shown to exist,' Judge Baltasar Garzón, Spain's leading anti-terrorist judge declared recently.
Doesn't it seem plausible that a connection exists between the trouble the painter was having with his eyes and his beginnings as an Impressionist?
Nevertheless, a connection exists between arterial and venous circulation by way of the foramen of Panizza, which opens between the two vessels leading separately from the ventricles.
Although the health problems of 9/11 first responders have not been definitively linked to environmental conditions immediately after the destruction of the World Trade Center, common sense suggests that such a connection exists.
