They are sincere and DO oppose the CCIA however they are both US Congresspersons and hold little sway sans quit-pro-quo over the NY Legislature.
On a slight tangent, many of the County Legislatures are rising in opposition which has about as much meaning and influence to the downstate Democrat machine.
Is it any odd coincidence that the Cities and States with such dramatic failure are being led by Black Caucus members of the Democratic National Convention?