Ryan Lizza makes a good point:
Think of the decision from Comey’s perspective. He could either disclose the new development now and risk being accused of influencing the election, or he could keep quiet; then, when the news of Abedin’s laptop inevitably leaked, he could be accused of caving to Lynch and her staff and keeping the information from voters. If the news leaked after the election and after Hillary Clinton was President, Republicans would turn the non-disclosure into a monumental scandal and allege that Comey played a role in a Lynch-instigated cover-up. If Clinton were President, the ensuing scandal would taint her victory, with Republicans arguing that voters were kept in the dark about a major development in one of the central issues of the campaign.
Let’s hope this will be the case. Lizza concludes:
It’s far better for the public to have this information now than after the election. Perhaps it’s possible that this revelation will swing the election to Trump. But it seems highly unlikely. Clinton is still favored to win, and, if she does, Comey will have done her a favor.