WASHINGTON — In a joint news conference on Monday with Senator Mitch McConnell, the majority leader, President Trump sought to reaffirm his relationship with Republican leaders in Congress, promised new decisions on the opioid epidemic, tax cuts and health care, and blamed the Cuban government for mysterious illnesses that racked the United States Embassy’s staff in Havana.

But the president also strayed into other subjects — some topical and others peripheral, including Hillary Clinton’s comments on protests by N.F.L. players.

Here is a smattering of other asides from Mr. Trump’s news conference in the Rose Garden.

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