There are sloppy persons everywhere.
I understand that and you must also realize that one of the ways Democrats undermine a district like Newt’s old district is to infiltrate, long term, into the elections process. Clerks, Supervisors, Captains, etc.
I lived all my life except for service in that district until 2003 when my whole family gave up on it. Thousands and thousands of new Section 8 movement, old worn out houses interspersed among million dollar McMansions that were Dinking their interest-only loans and reaping deductions - great thing, right up until the bust and the bottom fell out of their “investments.” They no longer were “investments” but albatrosses. I watched it over a long time.
I moved up to Pickens and out of Cobb where I lived among majority Republicans and I joined the voter volunteer staff. I saw the beginnings of what they did in Cobb there too.
Finally, I’d say that an honest and trustworthy person does not leave that much sensitive and restricted data “in a car on Saturday night.”