vote of confidence
noun /ˌvəʊt əv ˈkɒnfɪdəns/
  /ˌvəʊt əv ˈkɑːnfɪdəns/
[usually singular]- a formal vote to show that people support a leader, a political party, an idea, etc.
- The leader was given a vote of confidence by the party.
 - The government received a massive vote of confidence from the electorate.