An informal qualification to run for the Senate would be that the candidate must appeal to a wide range of voters. Senators also have to be at least 30 years old and have to have been a citizen of the United States for the past 9 years. They must also be inhabitants of the state they are representing. These are some of the qualifications need to run or become the Senate of a state.
Please remember that it helps to provide the choices that match your question. This can help you get an accurate answer and have your question answered much quicker.