President Trump repeatedly invoked unsubstantiated conspiracy theories, such as 3 million illegal votes, in his first week in office.

Judge as of early 2017. True: President Trump publicly asserted, more than once, unsubstantiated claims such as that 3–5 million illegal votes were cast in the 2016 election, with at least one such assertion in or around his first week in office (from 20 January 2017), and the claim lacked supporting evidence. Mostly true: he repeatedly made such claims, but the timing falls slightly outside the first week, or 'conspiracy theories' covers only this one claim, repeated. Mixed: only a single instance can be documented. Mostly false: the statements were made but were not unsubstantiated. False: he did not make such assertions.

Set before the research began.

1. E1 Trump claims 3-5M illegal ballots cost him popular vote, cites no evidence CBS News · 23 January 2017

   “President Trump claimed that 3 to 5 million illegal ballots cost him the popular vote, CBS News’ Nancy Cordes and Catherine Reynolds confirmed on Monday night. The claim is unproven.”

2. E2 Trump Repeats Unsubstantiated Claim About Voter Fraud During Election ABC News · 24 January 2017

   “During the meeting with Congressional leadership, Trump said "3 to 5 million illegals" voted, according to two Democratic aides. But a Republican aide said the comments were made in jest.”

3. E3 Trump Claims Without Evidence that 3 to 5 Million Voted Illegally, Vows Investigation Snopes · 25 January 2017

   “He repeated the claim during his first week in office, telling Congressional leaders in a 23 January meeting that "millions of unauthorized immigrants had robbed him of a popular vote majority," the New York Times reported.”

4. E4 Trump Claims Without Evidence that 3 to 5 Million Voted Illegally, Vows Investigation Snopes · 25 January 2017

   “We are not aware of any evidence that supports the voter fraud claims made by President Trump, but we are open to learning more about the Administration's concerns.”

CBS News reported that President Trump claimed 3 to 5 million illegal ballots cost him the popular vote, and ABC News reported that at a meeting with congressional leadership he said "3 to 5 million illegals" voted; Snopes dated that meeting to 23 January (E1, E2, E3). CBS called the claim unproven, and ABC noted that a Republican aide said the remark was made in jest (E1, E2). The evidence covers only this one unsubstantiated claim, made more than once, rather than several conspiracy theories, which the criteria grade as mostly true.