The Supreme Court and Senator Kyrsten Sinema dealt fatal blows to two Biden Administration priorities Thursday. Summary Senator Kyrsten Sinema (D-AZ) took to the Senate floor Thursday to reiterate her opposition to blowing up the filibuster, dooming Biden’s “voting rights” legislation. A few hours later, the Supreme Court struck down Biden’s vaccine mandate for businesses. Sinema and Senator Joe Manchin (D-WV) reaffirmed their opposition to partisan changes to the filibuster, while emphasizing that they supported the underlying legislation. The bills …