He already has amassed about $4,000,000+.
Don't know where you're getting that figure but this is from 2015 from the left leaning McClatchy DC Bureau site:
NET WORTH RANKINGS OF THE S.C. CONGRESSIONAL DELEGATION
In the Senate:
In the House:
If you go to OpenSecrets.org you can access the original disclosure files and they show absolutely NOTHING of the sort. You are just spreading Fake News and lies!!!