Terry Moran, of ABC News, has tweeted that a second letter sent to the US Senate has tested positive for the poison ricin.
BREAKING: @abc has learned a SECOND letter sent to the US Senate has tested positive for the poison ricin.
More top news
The bill is President Trump's first attempt at passing a big legislative piece through Congress.
Settled and sunny for most tomorrow, a little more cloudy on Sunday.
Residents from a town in East Sussex where the Westminster attacker once lived have described him as "intimidating" and "unpleasant".