"to reassert it" is correct and usable in written English
You can use it to refer to restating or reaffirming a point or opinion that has already been expressed. For example: The speaker had previously argued that the meaning of life is to be found in self-reflection, and they chose to reassert it in their closing remarks.
But if Mr Xi believes that the only way of ensuring stability is for the party to reassert its control, it remains possible that he will authorise force.
Most important, if structured properly, it could allow the United States to reassert its leadership (provided it listens to other members), mitigating China's influence.
Placing Iran on the enemies list may also encourage it to reassert its claims over the offshore Caspian oilfields that are in dispute with the Republic of Azerbaijan.
And Mr. Barak, by drawing such a clear-cut border with Lebanon, has enabled Israel to reassert its real strengths there: It can now use its powerful air force, unrestrained; it can hold the Lebanese and Syrian governments responsible, without ambiguity; it now has the backing of the world community for any self-defense along the Lebanon border.
TOKYO — Toyota Motor began selling its next-generation Prius hybrid in Japan on Monday as it seeks to reassert its clout in an increasingly crowded market for green cars.
Its successor, the Federal Security Bureau (FSB), has remained highly active in Estonia and its Baltic neighbours, Latvia and Lithuania – increasingly so recently as Russia seeks to reassert its sway over what it calls the "near abroad".
Analysts said that the United States was right to reassert its commitment to Lebanon, but that it may be acting too late.
It challenged the UK to reassert its moral responsibility to provide justice for people in developing countries.
Seeing the diplomacy advancing quickly without it, the opposition coalition — notorious for feuding and indecision — moved to reassert its relevance.
It is the second time in one week that Qualcomm has failed in its quest to reassert its ownership of various mobile technology patents.
