Transferring campaign donations to personal use is a felony, precisely because it does amount to bribery as enabled by money laundering. Recent case, ending in prison conviction:
https://www.justice.gov/usao-sdca/pr/former-congressman-dunc...
https://www.justice.gov/usao-sdca/pr/former-congressman-dunc...
Now, perhaps the scheme I just outlined is a bit too obvious, but I certainly don't doubt that far more sophisticated money laundering schemes that leverage the recent supreme court decision are happening now and will happen in the future.
https://www.salon.com/2022/05/17/fec-block-action-on-alleged...