His Republican primary opponents seized on this, as you would expect.
But opponents, who have already used the court to set back the project, seized on the announcement.
His opponents have seized on the test results in their advertising.
Opponents of the legislation have clearly seized the momentum in the debate.
Following the debate, Clinton's opponents seized on the performance.
If he looks down at his feet, his opponent will seize the opportunity to attack.
But his opponents seized upon the events and charged that he had been ambivalent.
Other opponents of the genetically modified grass seized on the results.
The mayor, and his potential opponents, should seize this moment to uphold the principles behind a system that works.
Opponents of a new stadium have nonetheless seized on the economists' arguments.