[Grammar] Can I omit 'that'?

[Csika]

Dear Forum Users,

Could you please tell me if I can omit 'that' from the following sentence:

"Thomas Whittacker, for instance, argues (that) if the workers go on strike on Monday ... ?

Thank you.

Csika

 

[bhaisahab]

Dear Forum Users,

Could you please tell me if I can omit 'that' from the following sentence:

"Thomas Whittacker, for instance, argues (that) if the workers go on strike on Monday ... ?

Thank you.

Csika

I wouldn't.