The phrase "asserted that it is" is correct and usable in written English.
You can use it when you want to indicate that someone has stated or claimed something to be true.
Example: "The researcher asserted that it is essential to consider environmental factors in the study."
Alternatives: "claimed that it is" or "stated that it is".
Pitching the plan on Thursday, the Treasury secretary, Henry M. Paulson Jr., asserted that "it is not too early to suggest appropriate policy responses," as if the problems had just started and he was a first-responder.
Meanwhile, in the other congressional chamber, Mike Rogers, chairman of the House Intelligence Committee, asserted that "it is abundantly clear that that red line has been crossed" with respect to Syrian use of chemical weapons.
"Until now the state hasn't proposed a certain sum or asserted that it is willing to take its pre-emption rights".
American regulators are also eyeing similar restrictions.Standard & Poor's upped the ante in its legal fight with the American government when it asserted that it is being sued in "retaliation" for exercising its right to "free speech" in downgrading America's AAA credit rating.
One way Worksoft has asserted that it is 'in it for the long haul' is through its partnerships with system integrators where Worksoft technology is embedded into their Enterprise Resource Planning ERPpracticesces to support their Agile, DevOps and SAFe methodologies.
Bridgman asserted that it is meaningless to interpret physical concepts except insofar as they are capable of observation.
The Catechism asserts that "it is legitimate to insist on respect for one's own right to life".
The lawmakers' letter asserts that "it was clearly never, as administration officials once insisted, the result of a popular protest".
Its interior surface was so shallow, the researchers asserted, that it was particularly vulnerable to edge-loading and shedding debris.
It is asserted that it was argued to the District Court on motions for new trial and in arrest of judgment.
The V.A. had asserted that it was meeting that goal 95 percent of the time.
