NONPARTISAN - keep it that way.
ARRO (the Association of Americans Resident Overseas) is a well known group supporting US expats. It has undertaken an initiative to determine which candidates, from
all parties, and from the most prominent States representing Americans in Europe, who are running for seats in the Congress and Senate in the upcoming election supports Americans abroad. If you are from California, Florida, Illinois, Massachusetts, New York, Ohio, Pennsylvania, Texas, and Washington, you will find the following most interesting. If your favourite candidate has not responded, you may want to enquire as to why they haven't.
Every candidate from
every party was sent the questionnaire. Responses can be found on the sidebar on the right hand side. Simply click on the State you are interested in. The questions concern taxation, services for Americans abroad, and access to banking and investing.
Self explanatory -
https://aaro.org/election-2018-candidate-statements-for-expat-americans