NYT:

A wide-ranging federal corruption investigation centered on two businessmen with ties to Mayor Bill de Blasio is also examining some aspects of his campaign fund-raising, a person with knowledge of the matter said on Friday.

The investigation, which in recent days has garnered attention because the focus on the two businessmen led federal agents to interview roughly 20 senior New York Police Department officials, has for some time been examining the ways the businessmen wielded influence in New York City government, several people briefed on the matter said.

That examination has included an aggressive review of Mr. de Blasio’s campaign fund-raising, the person with knowledge of the matter said. The investigation’s focus on Mr. de Blasio’s fund-raising was reported on Friday night by WCBS-TV News.

It was unclear what specific aspect of the mayor’s fund-raising was under scrutiny and how it related to the conduct of the two businessmen.