Is this written by the Larry Levy from Bracewell & Giuliani (yes, that Rudy Giuliani), and who worked on Giuliani's 2008 primary bid? (That is, in addition to being vice chair of th Republican National Lawyers Association, as described.)
If so, perhaps he's a bit, I dunno, biased?
I point this out not to say that connection must taint the source, but because there have been many investigations for the types of in-person voter fraud tested here ("died, moved out of the jurisdiction, or been convicted of a felony at least two years earlier").
And they've found bupkis. See https://en.wikipedia.org/wiki/Voter_impersonation_(United_St... for many of the relevant studies and court cases.
You'll notice that real-world data should be more convincing as a pen test like the WSJ editorial described specifically excluded the estimated probability needed for a valid risk assessment.
Someone could crash a tank through my front door to grab my laptop. A tiger team might even demonstrate that on a similar building to mine. But I'm not going to install anti-tank barricades to reduce the chance that already unlikely event will happen.
Permit me therefore to remain suspicious about a WSJ op-ed piece written by what appears to be someone with a strong financial and/or political reason to cast doubt on existing election security even if that doubt is unjustified.
EDIT: The 'Alan Schulkin, came under pressure resign after he was caught on tape telling the truth' is from a Project Veritas video, see https://en.wikipedia.org/wiki/Project_Veritas#New_York_City_... :
> In a follow-up interview with the New York Post, Schulkin stated, "I should have said 'potential fraud' instead of 'fraud'". Referring to the Project Veritas operative who secretely recorded him, Schulkin said, "She was like a nuisance. I was just trying to placate her", noting that in his haste to get away from her he "was agreeing with her when I shouldn’t have been."
You'll note that Levy writes "telling the truth", but doesn't present the evidence that this is actually the truth.