Hmm, another good article thanks. It lines up with what I mentioned in a previous post - maybe don't need to wait for official announcement before fundraising commences
An ‘exploratory committee’ in name only
Clinton is likely to launch an exploratory committee or other placeholder entity in early April, to take advantage of most or all of the federal campaign fundraising period that begins April 1, four strategists and supporters said.
The details of what kind of entity she should launch are still under debate among close advisers, strategists said. ...
An exploratory committee would function as a de-facto announcement, but Clinton could then take her time establishing muscular organizations in Iowa, New Hampshire and other key states, one Democratic strategist supporting her said.