He said the United States stands ready to impose further punishment in the days ahead.
Daniel Rubinstein succeeds Robert Ford, who retired late last month.
The Republican said the missing plane could have landed somewhere as part of terror scheme.
An investigation reportedly showed the officer had created an abusive work environment.
The poll also suggested young and elderly people were most likely to be satisfied.
A SEAL team took control of the tanker in waters near Cyprus.
A major anchor made the comments as exit polls were released in Crimea.
Legislators formally applied to join Russia one day after referendum.