Toomey was at a seminar over the weekend in Palm Springs, Calif., held by the billionaire Koch brothers, who put $3 million toward his re-election bid, while Democratic U.S. Sen. Bob Casey, Gov. Tom Wolf and others went to Philadelphia International Airport to support refugees and those detained there after the order was signed.

Toomey did not announce his support for Trump until the polls were almost closed on Election Day. Afterward, Toomey said he would not be a "rubber stamp" for Trump's initiatives.

“I support the administration's decision to increase vetting and temporarily suspend the admission of certain individuals from states that sponsor or provide safe havens to terrorists, or are too weak to prosecute terrorists within their borders. Terrorists have successfully infiltrated refugee populations entering Europe and gone on to commit heinous acts of barbarity. I have long been concerned about our ability to distinguish between predominantly peaceful and innocent refugees, and the likely rare, but lethal, terrorists in the midst of those refugees coming from terror havens and lawless lands. That is why I, along with a bipartisan majority of the House and Senate, supported the SAFE Act, which called for enhanced vetting.

“Unfortunately, the initial executive order was flawed – it was too broad and poorly explained. This apparently resulted in denied entry into the United States for lawful permanent residents and others who should have been allowed immediate entry. Fortunately, the administration has clarified that this order does not apply to Green Card holders and that the Secretaries of State and Homeland Security have the ability to grant exceptions which certainly should apply to, among others, foreign nationals who served the U.S. military in various support roles.