MTP NOW August 1 — Trump's power tested; Tensions over Taiwan; Kentucky flooding

<p>Former President Donald Trump’s influence will be tested in Tuesday’s primary elections. Vaughn Hillyard, Yamiche Alcindor, Shaq Brewster and Dasha Burns report. Rick Tyler, Juanita Tolliver and Lisa Desjardins join the Meet the Press NOW roundtable. Nancy Pelosi travels to Asia as China warns against a trip to Taiwan. President Joe Biden tests positive for Covid again after taking Paxlovid. Dr. Kavita Patel provides updates on the Monkeypox outbreak. The death toll in Kentucky's floods surpasses 30.</p>