The phrase "delegate by" is correct and can be used in written English.
It is commonly used to refer to the act of assigning a task or responsibility to someone else. Here is an example: "The manager decided to delegate by assigning the task of organizing the company picnic to the new intern."
Another issue we had to solve, is which attribute should be delegated to the delegate by the delegator.
The delegator now gives this URL to his chosen delegate, by any out of band means e.g. via SMS, email or memory stick.
Finally, at 3 p.m., Dennis Tippets was elected a Romney delegate by one vote.
But Grimm has already been replaced as the G.O.P.'s presidential delegate by former Borough President Guy Molinari.
The Soviet delegate, by threatening to walk out, obtained additional time to speak on behalf of the Russian system of pollution control.
The race drew to its final hours with a burst of announcements — delegate by delegate — of Democrats stepping forward to declare their support for Mr. Obama.
In this delegate-by-delegate battle, every state counts.
Guam's caucuses took on added significance this year as the Democrats are locked in a delegate-by-delegate battle.
And Mr. Romney's campaign, which prides itself on having prepared all along for a difficult delegate-by-delegate fight, has said that it does not ultimately worry that Mr. Santorum will steal the nomination away.
Throughout the long primary season, Chuck Todd, the political director of NBC News, turned to maps and charts to help explain the state-by-state — and delegate-by-delegate — maneuverings.
There are few outward signs that panic has set in at the Romney campaign — the delegate-by-delegate chess game has only begun — but concern is palpable among Mr. Romney, his allies and Republican Party elders, many of whom are increasingly fretting aloud about the prospect that he may not be as electable as he seemed only weeks ago.
