Washington tightening election security measures after ballot box fires in Vancouver, Portland

Nearly 500 ballots burned in Vancouver ballot box arson

Clark County adds watchdogs after Vancouver, Portland ballot box fires

Ballot boxes in Vancouver, Portland set on fire; hundreds of ballots destroyed

After Vancouver ballot box fire, county's ballot boxes being monitored 24/7

Ballot box arson in Vancouver, Portland linked, investigators say

News conference: Election officials discuss Portland and Vancouver ballot box arson

New surveillance video shows moment ballot box fire started in Vancouver

Oregon election workers face misinformation, threats; police seek culprit in ballot box arsons

Gluesenkamp Perez, Kent reacts to hundreds of ballots destroyed in Vancouver

Ballot drop box fires under investigation in Oregon, Washington

Burned ballot drop boxes under investigation