Were there any chance of Mr Zuckerberg's company moving in a similar direction to ban political ads, it would likely be a blow to Mr Trump's re-election chances.
Not least in light of the allegations that his 2016 victory rested in part on the campaign's intense targeting of swing voters on social media, using a vast bank of voter profiles compiled using the Facebook data of millions of people.
Mr Dorsey also appeared to highlight the dangers of this in his announcement, when he said:
These challenges will affect ALL internet communication, not just political ads. Best to focus our efforts on the r… https://t.co/nMSUmNCs0q