Half the country buying Trump's unfounded case against mail voting

There remains essentially no evidence for President Trump's constant claims that expanded voting by mail will allow the November election to be stolen from him. But a new poll shows his dark warnings are nonetheless resonating with the public.

Mail-in voting is vulnerable to significant levels of fraud, in the view of almost half of respondents to the latest ABC-Washington Post poll, released Tuesday. The share who said so, 49 percent, matches the number from a similar poll by Gallup this spring.

The new finding is important for several reasons:...