Trump is the only one that is not owned by rich donors.
Go Trump!
All politicians are looking to advance their political careers and are owned by rich donors
The solution is relatively simple, if we have the cojones to enforce it. Term limits will practically eliminate the career politician. The cream will rise to the top; the best will serve two terms in the house, two in the senate, two as VP and/or POTUS. The rest will serve and go home with a nice resume enhancement. The key word is SERVE. They have morphed into masters!
And all political donations should be anonymous. You can not sell influence if you don't know who is buying. An individual or business should be able to donate all they want to any party or candidate; that is FREEDOM. In the competition for funding candidates would be forced to take positions publicly on a wide range of issues. Lobbyists could still lobby, but without the quid pro quo (bribery) that is common now.
Make it a felony to disclose who a donor is, or to attempt to discover who a donor is. A few lobbyists and officeholders marched off to prison should ice the cake.