I've been hard on the DCCC in the past, so it's only fair to say that I think their new ad buy is absolutely the right strategy for the 29th district.
The first thing that stands out about the buy is its size -- $900K per candidate. It's a big buy, the biggest we've seen from the DCCC in this area.
But even more significant is that all three candidates are grouped together in the buy. That's critical because the Rochester-area districts are so gerrymandered that a lot of residents don't know who they're voting for until they enter the voting booth. If the DCCC ad campaign emphasizes what the candidates hold in common, a voter who agrees with the candidates' shared positions will feel comfortable pulling for the Democrat in that voter's district, even if the voter is surprised in the booth on election day.
The co-marketing of the candidates is also powerful because of the expected Democratic majority in both houses of Congress. It indicates that voting for a Democrat is voting for a team that can work together to bring federal dollars back to all of Western New York.
Of course, this assumes that the grouped buy indicates a co-marketing strategy, and that the DCCC will actually use the time they've reserved. The former is just a hope, but I have little doubt about the latter, since the DCCC has been raising money hand over fist.