New York Times, June 19, 2019
Time out. Stop. The claim that Iran has ties to Al Qaeda is a complete and total lie.
The Trump team must be getting desperate. It is true that Iran allowed some escaping relatives of Osama bin Laden to stay in Iran for a time, but this is a far cry from Iran having ties to Al Qaeda. Al Qaeda is an extreme reactionary Sunni faction of the Hanbali school of Islam. They are Wahhabi/Salafi in orientation (the Wahhabis and Salafis claim that they are different, but they espouse the same extreme views). They espouse killing of Shi'a Muslims as "not a sin," because they view Shi'ism as heretical. They have made this pronouncement many, many times. Persecution of Hazara Shi'a Muslims in Afghanistan is directly related to Al Qaeda and Taliban calls to murder them.
So is it even slightly plausible that Iran is somehow tied to Al Qaeda?
Republicans and neoconservatives tried to make this false equation during the Bush administration as a way to convince Republicans to attack Iran and effect regime change. This didn't work then, and Congressional representatives, no matter how much they dislike Iran, should not buy this utter garbage argument. It is being promulgated for the same aim as in 2003--namely to garner support for regime change in Iran.
Message to Congress: Don't buy this utter lie!