Shrieking Specter and ensnaring bridge

[peanutbutter]

can Shrieking Specter attack a player who is holding 2 cards in his hand and controls an ensnaring bridge?

[DatAsh]

Yes, why wouldn't it be able to?

[Arix]

Ensnaring Bridge only stops a creature from being declared as an attacker. It does nothing once a creature is already attacking, no matter what happens to that creature's power or the number of cards in the player's hand afterward.