Sounds like USC is stepping it up with him and could offer soon. By no means has Warner hinted he would flip commitments but it would be more serious competition as his recruitment continues.
https://footballrecruiting.rivals.com/content.asp?CID=1767138&PT=4&PR=2
https://footballrecruiting.rivals.com/content.asp?CID=1767138&PT=4&PR=2