Whose church./ Which church?
If you mean a universal Catholic Church, I'd say no. Then again I don't believe in an assembly of all denominations, individual churches as one entity gathered for God's specific purposes. I don't know if that's how you define the church, but my former one did. I didn't agree and reenlist membership under that term of belief which they required.
Are there churches which have God's power?
Of course. Romans 1:16
If they are soul winning and preaching the gospel to the world they do. If Christ is the head of his body and the Holy Spirit indwells them, they exercise power in prayer, preaching and spiritual combat while assembled. Individuals are endured with power outside of church too when meeting God's conditions.
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For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.”
1Moreover, brethren, I declare unto you the gospel which I preached unto you, which also ye have received, and wherein ye stand; 2By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain.
3For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures;
4And that he was buried, and that he rose again the third day according to the scriptures:"