>watermarks
Ballots are different throughout every county and city, sometimes each jurisdiction having several (such as several where congressional districts intersect counties)
They were printed by the jurisdictions between about Sept 1 and Sept 14 and in many were being mailed or distributed immediately
To watermark them, DHS would have had to have teams literally in every town almost simultaneously which would have looked like a military invasion or at minimum an invasion of official vehicles
It would have been unprecedented and in the news and social media everywhere
So no, there is no fucken way the ballots all over America were watermarked by an agency
Whatever was done to safeguard the election, whatever Trump has as his ace in the hole, it is something else