By Steve Neavling
ticklethewire.com
The FBI and Secret Service are investigating a threatening letter received by the Donald Trump’s sister, who is a federal appeal court judge in Philadelphia.
Maryanne Trump Barry, 78, received the letter on Friday, Metro reports.
Authorities also are investigating a letter sent to Trump’s son, Eric Trump, who found a granular substance in the delivery.
The letter to Trump’s sister did not contain water powder but demanded that Trump drop out of the presidential race.
