The phrase "platform against" is correct and usable in written English.
This phrase can be used to refer to a system, organization, or tool created to address an issue or oppose something. For example: "The senator used her speech as a platform against the new tax law."
Pitching authenticity, she said, is a "platform against a tidal wave of new competitors".
Gatland has made three changes to his tight five after the failure to provide a platform against England.
Now, he said in an interview, Mr. Street's campaign is floating conspiracy theories to use his platform against him.
Still, he won the vote on a platform against corruption and thousands of cheering supporters welcomed "Uncle Jona" into office.
The action takes place on a raised platform against looming concrete walls and a sinister iron staircase.
The democrats will never pursue a platform against corporate power when so many of their donors are corporations.
The PDI-P, as an opposition party, has a clearer platform: against privatisation and for stronger workers' rights.
He created an army (by conscription of peasants) and a separate financial administration, but he may have wanted a platform against the Danish nobility to work for absolutism.
One decision the delegates made to vote with the platform against reform of the present voting system in elections & against the adoption of proportional representation.
In terms of effort and confrontation, we built a strong platform against the best team in the league, but we were not clinical enough".
The BBC correspondent Martin Bell, who was elected as an Independent MP for Tatton from 1997 to 2001 having stood on an anti-corruption platform against the sitting Tory MP, Neil Hamilton.
