The phrase "a realignment in" is correct and usable in written English.
It can be used when discussing changes or adjustments in a particular context, such as organizational structure, policies, or strategies.
Example: "The company announced a realignment in its marketing strategy to better target younger consumers."
Alternatives: "a shift in" or "a change in".
Mr. Sharon's decision to break from his right-wing Likud is causing a realignment in politics.
Last July's agreement with world powers brought a realignment in Iranian politics.
So Sharon's last-minute attempt to bring about a realignment in Israeli politics ended in failure.
But neither the 1968 nor 2000 Republican presidential victories produced anything resembling a realignment in favor of the Republicans.
He predicts a realignment in which various branches of Judaism will become more traditional and, paradoxically, more separate.
"But we will see a realignment in Greek parliamentary politics in support of the deal which, hopefully, will be cathartic and provide stability," he said.
The N.H.L. and the N.H.L. Players Associationn have been negotiating a realignment plan in recent weeks and a decision is expected soon so the new system can be put in place for the 2013-14 season.
Ponta's departure may lead to a political realignment in Romania, where a coalition of three parties form a majority in parliament.
In part as a result there has been a gradual realignment in Turkish foreign policy towards its more immediate neighbours.
We did not use the Multiz alignments, because they contain three additional genomes (insects), and removing those sequences would effectively require a complete realignment in order to obtain a fair comparison between screens performed on different input alignments.
We will lose an historic opportunity to create a progressive realignment in American politics.
