Trump's immigration action his first stumble with GOP

President Trump is facing his first serious pushback from congressional Republicans since taking office as outrage swirls over his immigration executive order.

It isn't the full-scale retreat Trump endured during several campaign controversies, such as the release of the "Access Hollywood" tape. Most of the criticism from Republicans has been measured, especially compared to the full-throated condemnations from immigrant, human rights and progressive groups who characterize the executive order as a "Muslim ban."

The most vocal Republican critics have an anti-Trump track record predating this controversy. Liberal outlets have published lists of the high number of GOP lawmakers who haven't weighed in at all.

But the defections sound a rare discordant note as Republicans celebrate the dawn on their unified control of the federal government for the first time in over a decade, and raise questions about how the party will handle backlash against Trump in the future.

A common refrain was that the "extreme vetting" executive order wasn't properly vetted itself. "It is clear from the confusion at our airports across the nation that President Trump's executive order was not properly vetted," wrote Sens. John McCain, R-Ariz., and Lindsey Graham, R-S.C.