Senator Tom Cotton lashes out at Lindsey Graham for 'bullying' Trump adviser Stephen Miller

An Arkansas Republican slammed his South Carolina counterpart on Thursday for "bullying" White House adviser Stephen Miller over his role in the immigration debate.

The Washington Examiner reported that Sen. Tom Cotton (R-AR) was referencing Sen. Lindsey Graham (R-SC) in a tweet he made, who earlier in the day said Miller and the Homeland Security secretary are "two of the most extreme characters in Washington" when it comes to immigration.

"Embarrassing for a senator to attack a staffer," Cotton tweeted. "No worse example of punching down & bullying someone who can't defend himself."

Soon after, the Examiner's Anna Giaritelli confirmed that Cotton was referencing Graham.

Miller, a 32-year-old senior policy adviser to President Donald Trump, is known for his far-right views on immigration. He gained notoriety early in the Trump administration for helping craft the president's numerous attempts at banning people from a list of Muslim-majority countries from entering the United States.