In the past, political parties created policy platforms, so that party supporters knew what the party, and the legislators elected from the party, would be working to achieve. That was also to inform voters what the party stood for, so they could make an informed choice about who to vote for.
The Republican party just finished its convention. But while a platform was approved, there was no mention of it in the speeches. The nominated leader of the party has continued the same method used during the primary, which is to speak in slogans, but offer no plan. And to divert attention from not having a plan by denigrating his opponents.
He says he will make American great again. But we have no idea how, or whether he does, either.