“Guccifer,” the hacker who breached the email accounts of a Bush family member and close friends of the powerful political family, has turned his attention to the other side of the aisle by gaining access to the AOL account of former Clinton adviser Sidney Blumenthal.

Blumenthal, 64, worked as a senior advisor to former President Bill Clinton and also served as an aide for Hillary Clinton’s 2008 presidential campaign.

He was unaware that his AOL email account was compromised until Thursday morning, when Blumenthal was unable to login, the ex-Clinton adviser told the Smoking Gun. He has since been able to gain control of his email.

While Guccifer was able to access all correspondence to and from Blumenthal’s email account since 2005, the hacker was particularly interested in exchanges between Blumenthal and Hillary during her tenure as secretary of state, the website reported.

Guccifer also found emails between Blumenthal and “political operatives, journalists and government officials,” according to the Smoking Gun.

The hacker did not reveal whether he was planning on releasing the information, which included “foreign policy and intelligence memos” sent by Blumenthal to Hillary.

The Smoking Gun first reported last month about Guccifer’s hacking into the email account of Dorothy Bush Koch, daughter of former President George H.W. Bush and sister of ex-President George W. Bush. The emails included pictures of the younger Bush’s foray into painting, which he has taken up since leaving office in 2004, and the health condition of the elder Bush.

Guccifer also breached the accounts of Bush family friends, including CBS sportscaster Jim Nantz and Willard Heminway.

Former Secretary of State Colin Powell was another Guccifer victim, with the hacker breaching Powell’s AOL account and defacing his Facebook page.

Other victims included U.S. Sen. Lisa Murkowski, R-Alaska, ex-FBI agents, members of the Rockefeller family and former U.S. Ambassador to the United Nations John Negroponte, according to the Smoking Gun.