52 U.S. Code § 30121.Contributions and donations by foreign nationals
"(a) ProhibitionIt shall be unlawful for— ..."
"... (2)a person ..."
Trump
"... to solicit, ..."
"Do me a favor though..." - Donald Trump
"... accept, or receive a contribution or donation described in subparagraph (A)..."
Subparagraph (A) "a contribution or donation of money or other thing of value..."
Dirt on Joe Biden by way of his son.
"... or to make an express or implied promise to make a contribution or donation, in connection with a Federal, State, or local election;..."
At the time this was requested in July, Joe Biden was beating Trump in the polls. There's your motive, your agency, and your opportunity.
"... or (B) of paragraph (1) from a foreign national."
President of Ukraine.
Full verbiage of the law without breaks. Since Paragraph one does not apply first, you go on to paragraph two. There, it redirects you to point A or B of Paragraph 1 to better define paragraph 2.
(a)ProhibitionIt shall be unlawful for—
(1)a foreign national, directly or indirectly, to make—
(A)a contribution or donation of money or other thing of value, or to make an express or implied promise to make a contribution or donation, in connection with a Federal, State, or local election;
(B)a contribution or donation to a committee of a political party; or
(C)an expenditure, independent expenditure, or disbursement for an electioneering communication (within the meaning of section 30104(f)(3) of this title); or
(2)a person to solicit, accept, or receive a contribution or donation described in subparagraph (A) or (B) of paragraph (1) from a foreign national.