“Trump will cancel or postpone the midterms.”
On the record
The fear has a source. In January Trump told Reuters, "when you think of it, we shouldn't even have an election," and the White House said he was "simply joking." Asked in August and September about declaring an election emergency, he said "stranger things have happened" and "I don't rule anything out or in." The emergency proposals on the record would change the rules of the vote, such as voter ID and mail ballots, not its date, and we have found no reported order, draft or bill that would move it. One state did stop a federal election midway: Louisiana's governor suspended its U.S. House primaries in May to redraw the map, discarding ballots already cast. Those voters, he said, "will vote again in November."
A Draft Executive Order Declaring an 'Election Emergency' · Louisiana Cancels Its Own Primaries in the Middle of Voting
What stands in the way
Federal law sets the date: "The Tuesday next after the 1st Monday in November, in every even numbered year" (2 U.S.C. 7). The Constitution gives the rules for congressional elections to state legislatures and to Congress (Art. I, Sec. 4), not to the president. The 20th Amendment ends House terms "at noon on the 3d day of January" whether or not anyone has been elected, so a delay would keep nobody in office. The Congressional Research Service: "there is no current constitutional authority residing in the President of the United States, nor the executive branch of government, to postpone, cancel, or reschedule elections for federal office in the various states."
What would have to happen
A presidential order or proclamation that tries to change when or whether the election is held, or a bill in Congress to move it.
Reporting Democracy Docket: Trump: 'We shouldn't even have an election' · Democracy Docket: White House claims Trump was 'joking' when he talked about canceling election · HuffPost: Trump Entertains Plot To Declare A 'National Emergency' Over Elections · TIME: Read TIME's 'What Trump Has Built' Interview Transcript · HuffPost: Jeff Landry says Louisiana voters whose primary ballots were discarded 'will vote again' · ACLU: Civil rights groups file emergency challenge to Louisiana governor's attempt to suspend election already underway
Law, analysis and fact-checks 2 U.S.C. 7: Time of election (Cornell LII) · U.S. Constitution, transcript (National Archives) · U.S. Constitution, Amendments 11-27 (National Archives) · Congressional Research Service: Postponement and Rescheduling of Elections to Federal Office (RL32623)