Having worked in professional politics my entire career Andre Carson will be a very hard incumbent to unseat. Whether you agree with him or not (and I disagree with 99.9% of the time) the one thing he is very good at is campaigning. He inherited an established working module from his aunt and former holder of the seat Julia Carson.
The only person that can beat Andre Carson is Andre Carson. Plus it's an over whelming democrat district.
Just my thoughts...