Trump has a speech tonight, but some TV networks haven’t said if they’ll air it.

President Trump has sowed doubts about the integrity of U.S. elections for over a decade. What he has not done is furnish proof to support his claims that there was widespread fraud, that foreign powers have hijacked votes, or that federal or state officials plotted to rig either the 2020 election he lost to Joseph R. Biden Jr. or other contests he has questioned.Mr. Trump is likely to revisit some of those assertions during a prime-time address to the country Thursday that is expected to center on election security, potentially intensifying his efforts to undercut faith in the results of American elections.His false claims, however, have at times either exaggerated or obscured some genuine security concerns around elections, particularly as they relate to foreign meddling.In recent years,