Given a sentence and two mentions from the text (arguments), indicate a phrase (a verb or noun phrase) that describes the relationship between the provided arguments.

Sentence: 'I could not have been in a better place to witness Barack Obama elected president of the United States .', Argument/Subject 1: 'obama', Argument/Subject 2: 'unite state'
be president of

Sentence: '1860 - Lincoln is elected the 16th President of the United States , the first Republican , receiving 180 of 303 possible electoral votes and 40 percent of the popular vote , with the South voting almost solidly against him .', Argument/Subject 1: 'lincoln', Argument/Subject 2: 'unite state'
be elect president of

Sentence: 'Neither Republicans nor Democrats obtained simultaneous control of the House , the Senate , and the presidency for more than a single period of two years during this time .', Argument/Subject 1: 'house', Argument/Subject 2: 'democrat'

be control by