I cannot imagine Lincoln's refusing his assent to this measure.

By using the possessive, the writer will always be on the safe side.

In the examples above, the subject of the action is a single, unmodified term, immediately preceding the verbal noun, and the construction is as good as any that could be used. But in any sentence in which it is a mere clumsy substitute for something simpler, or in which the use of the possessive is awkward or impossible, should of course be recast.

In the event of a reconsideration of the whole matter's becoming necessaryIf it should become necessary to reconsider the whole matter
There was great dissatisfaction with the decision of the arbitrators being favorable to the company.There was great dissatisfaction that the arbitrators should have decided in favor of the company.

People. The people is a political term, not to be confused with the public. From the people comes political support or opposition; from the public comes artistic appreciation or commercial patronage.

Phase. Means a stage of transition or development: “the phases of the moon;” “the last phase.” Not to be used for aspect or topic.

Another phase of the subjectAnother point (another question)

Possess. Not to be used as a mere substitute for have or own.

He possessed great courage.He had great courage (was very brave).
He was the fortunate possessor ofHe owned

Prove. The past participle is proved.