The president must sign or veto a law made by congress before it goes into effect. this is an example of which principle in action?  

separation of powers 
judicial review 
federalism
popular sovereignty 

answer:

a

explanation:

the veto allows the president to “check” the legislature by reviewing acts passed by congress and blocking measures he finds unconstitutional, unjust, or unwise. congress's power to override the president's veto forms a “balance” between the branches on the lawmaking power.

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i hope this your understandings.

yes he can but hardly

explanation: