The Democrats may cheat, but they don't need to cheat.
Nationally, they outnumber Republicans by about 4%.
If they turn out their voter base - non-whites, immigrants, single women - they can stop a GOP Senate majority legally.
That would be based on registered voters, and as anything to do with government a dubious stat.
There’s a song out by a young lady that has lyrics “...just because I said it don’t mean I meant it....”