This article is absolute garbage. He never said they are importing voters "to vote for Harris in the 2024 election".
He said the Biden/Harris admin is flying in migrants, which is somewhat true -- they are allowing migrants with temporary status to fly directly into the US on commercial flights. [1]
He said they want to give them a path to citizenship, which is true. [2]
If these people have Temporary Protected Status for many years living in the US, do you think there is any political will to deport them at that point? If they will not be deported, Democrats will want to give them a path to citizenship. Citizenship means they are then allowed to vote.