The phrase "a platform of hope" is correct and usable in written English.
It can be used in contexts where you want to convey a sense of optimism or a foundation for positive change or aspirations.
Example: "The new initiative serves as a platform of hope for the community, inspiring individuals to work together for a better future."
Alternatives: "a foundation of optimism" or "a base of encouragement".
You ran on a platform of hope and, boy, are you delivering.
Rouhani campaigned, much like his American counterpart five years ago, on a platform of hope and change.
Obama was elected on a platform of hope and of confidence — especially, I'd say, of the confidence that he personally inspires.
Saying that word in front of tens of millions of viewers could be a very risky proposition for the candidate running on a platform of hope.
He noted that the electoral debacle of 2014 had come six years to the day after his triumphal appearance in Chicago's Grant Park to celebrate his 2008 election on a platform of hope and change.
So Obama runs on a platform of hope.
Ardern – a 37-year-old former Mormon and occasional DJ – campaigned on a somewhat nebulous platform of hope and change.
Mr. Obama campaigned on a platform of change; let us hope that future policy directions of the new administration will work toward real positive change for the American automobile industry.
Donald Trump won on a platform of "change". He offered hope to the hopeless and won an incredible outpouring of support from those who have been ignored for too long by both political parties.
On the one hand, you have Barack Obama, who we haven't quite seen deliver on his platform of "Hope and Change" (although he does do a pretty good Bieber) and on the other hand, you have Mitt Romney, who sounds like he'd do and say just about anything to live in the White House.
It's nothing new to play into the fears of an entire nation, but fear has seeped into our consciousness and replaced Obama's platform of hope.
