As Harmeet Dhillon seeks the chairmanship of the Republican National Committee, opponents have begun raising concerns about her Sikh faith -- a development that has left some members of the committee unsettled.

Two supporters of Dhillon, who is challenging incumbent RNC chairwoman Ronna McDaniel, told POLITICO that McDaniel allies have brought up Dhillon's religious affiliation with them in recent weeks. One of the two said that a fellow RNC committee member, who is openly supporting McDaniel in the race, brought up concerns about Dhillon's "Sikh faith" during a recent phone conversation. That person was granted anonymity to discuss the matter.

The topic has become so buzzed about that Dhillon herself has been forced to address it publicly, this week retweeting RNC members who condemned those drawing negative attention to her religious affiliation.