GOP ramps up scrutiny of green card holders and U.S. citizens

• The suspected assailant arrived in the U.S. from Afghanistan under a Biden-era parole program and was granted asylum this year.
• Another Afghan national was arrested this week on suspicion of making a bomb threat online.

Driving the news: Sen. Bernie Moreno (R-Ohio) introduced legislation on Monday banning dual citizenship — forcing immigrants to choose just one citizenship.

• Sen. Tom Cotton (R-Ark.) announced a new bill on Wednesday that, among other restrictions, would allow the Homeland Security secretary to strip citizenship from immigrants if they join riots or violent protests.
• Rep. Chip Roy (R-Texas) has been pushing his "PAUSE Act," which would freeze all legal immigration and end automatic birthright citizenship.

Zoom out: Online, MAGA influencers and candidates have been promoting their own aggressive anti-immigration wish lists — from shutting down the refugee program to mass denaturalization, as Axios' Tal Axelrod reported.

• President Trump on Sunday said he would "absolutely" denaturalize certain Americans if he could.
• Multiple Senate Republicans were not ready to weigh in on such an idea, citing unfamiliarity with the legal arguments.

What's next: The Supreme Court announced Friday it will take up a case on Trump's executive order to end birthright citizenship. If the justices agree with the president, the court could overrule a constitutional right it has previously upheld, Axios' April Rubin reports.