On the eve of the Republican National Convention’s opening night, President Trump on Sunday will hold a news conference at which he is expected to announce the emergency authorization of convalescent plasma for covid-19. The president’s campaign also released the lineup of speakers for this week, with members of Trump’s family scheduled to speak on each of the convention’s four nights.

Former vice president Joe Biden’s campaign, meanwhile, continued to hammer Trump over his handling of the coronavirus pandemic, with deputy campaign manager Kate Bedingfield saying Sunday that Americans “need to be confident that the process of getting to a vaccine is not politically manipulated.”

In an interview on ABC News’s “This Week,” Bedingfield also asserted that Biden has not contracted covid-19, the disease caused by the virus, although she added that he has not yet been tested.

Here are some significant developments: