Trump Faces Furor Over Unsubstantiated Claim Obama Wiretapped Him (** ILLEGAL **)

"PALM BEACH, Fla.—President Donald Trump called together several top advisers Saturday, including Attorney General Jeff Sessions and political strategist Steve Bannon, as the White House faced a growing furor over the president’s early morning claims he had been wiretapped by his predecessor."

[more at source...]

[link to www.wsj.com (secure)]

Note the following sentence:

"...but provided no evidence for what amounted to an extraordinary claim of illegal activity by a former president."

So, it is an illegal activity?