This September 12, 2018 Executive Order should apply nicely:
https://www.whitehouse.gov/presidential ... -election/
I, DONALD J. TRUMP, President of the United States of America, find that the ability of persons located, in whole or in substantial part, outside the United States to interfere in or undermine public confidence in United States elections, including through the unauthorized accessing of election and campaign infrastructure or the covert distribution of propaganda and disinformation, constitutes an unusual and extraordinary threat to the national security and foreign policy of the United States. Although there has been no evidence of a foreign power altering the outcome or vote tabulation in any United States election, foreign powers have historically sought to exploit America’s free and open political system. In recent years, the proliferation of digital devices and internet-based communications has created significant vulnerabilities and magnified the scope and intensity of the threat of foreign interference, as illustrated in the 2017 Intelligence Community Assessment. I hereby declare a national emergency to deal with this threat.
One of the remedies:
Sec. 2. (a) All property and interests in property that are in the United States, that hereafter come within the United States, or that are or hereafter come within the possession or control of any United States person of the following persons are blocked and may not be transferred, paid, exported, withdrawn, or otherwise dealt in: any foreign person determined by the Secretary of the Treasury, in consultation with the Secretary of State, the Attorney General, and the Secretary of Homeland Security:
(i) to have directly or indirectly engaged in, sponsored, concealed, or otherwise been complicit in foreign interference in a United States election;
(ii) to have materially assisted, sponsored, or provided financial, material, or technological support for, or goods or services to or in support of, any activity described in subsection (a)(i) of this section or any person whose property and interests in property are blocked pursuant to this order; or
(iii) to be owned or controlled by, or to have acted or purported to act for or on behalf of, directly or indirectly, any person whose property or interests in property are blocked pursuant to this order.
