Accounts who hold cash in banks. Protection by FDIC or SIPC?

Some brokers are now holding your cash balances in FDIC banks rather than money markets.

With those brokers, who protects the money in your account?

The SIPC or the FDIC?

Also, is there any pro's or con's in brokers holding the cash portion of your account in an FDIC bank vs a money market?

thanks

 

What would be an example of a broker that keeps customer cash in a bank account rather than the Prime Broker's account?

 

TD Ameritrade & UBS

 

if cash is deposited into an FDIC insured bank, then it's protected by the FDIC. tdameritrade's website says this, you lazy bum.