Watchdog says DHS still hasn’t got a 2020 election security plan

Here is a link to the original report summary, along with the full pdf of the report: https://www.gao.gov/products/GAO-20-267?mobile_opt_out=1#sum... and https://www.gao.gov/assets/710/704314.pdf

Specifically the watchdog is the Government Accountability Office, reporting on the Department of Homeland Security’s Cybersecurity and Infrastructure Security Agency (CISA).

Russia interfered on Trump's behalf in 2016 and they'll doubtless attempt to do so again in 2020. Why would his administration go out of its way to stop that from happening?