There was limited information provided to Hill about what's going on, two sources familiar with the meeting told CNN. But it has emerged that it is a meeting that Trump wants amid heavy criticism of the Capitol Hill over Erdogan himself and Turkey's recent actions in Syria.
It was formulated as an opportunity to "purge the air" and to have a serious and frank discussion about the true fissures in the relationship, which include outrage from the US over Turkey's purchase of Russian weapons systems, a source familiar with the meeting told CNN . But the source also acknowledged the meeting was very irregular and no one was sure what to expect.
Rish, who was critical of Erdogan and Turkey, is in the midst of drafting a bilateral sanctions bill aimed at the country. But lawmakers in both countries are also aware that Turkey is an ally of NATO and is likely to target Russia if disputes with the United States continue to solidify.
Still, the most vocal critics of Congress include some of Trump's closest Congressional allies, including Senator Lindsay Graham, a South Carolina Republican who has repeatedly warned Erdogan of the consequences of his actions and has drafted his own bill for country-specific sanction.
Other Republicans expected to be present were also extremely critical, according to one source who declined to name all those present until the White House announced the list.
Lawmakers on both sides of the aisle called for Trump to cancel the White House invitation entirely for Erdogan. The White House refused.
The meeting is closed to pressure and is referred to as "legislative commitment to elected Senate members" on the President's schedule.
The meeting will follow Trump's initial meeting with Erdogan, a limited bilateral meeting and an extended working lunch. Trump and Erdogan will attend a joint press conference later in the day.
Erdogan's visit comes a month after Trump withdrew US troops from Syria, sparking a Turkish invasion and sparking criticism from some Republican lawmakers. It comes a week after Congress passed a resolution recognizing Armenian genocide, another move intended to express its displeasure with Turkey.
A senior administration official who briefed reporters on the visit said Trump wants to continue "direct engagement and diplomacy where it matters most: Erdogan himself."