5 things to know for March 5: House investigation, Alabama tornadoes, Venezuela, HIV, Luke Perry

(CNN)Parts of Alabama are reeling this morning after an outbreak of tornadoes killed dozens. Here’s how you can help the survivors. Here’s what else you need to know to Get Up to Speed and Out the Door. (You can also get “5 Things You Need to Know Today” delivered to your inbox daily. Sign up here.) House Democrats have started their sweeping investigation of President Donald Trump, with the House Judiciary Committee asking for documents from 81 people and entities in Trump’s orbit. The mammoth probe — which will look into the President’s campaign, businesses, transition and administration — could be a sign the Democrats are laying the groundwork to impeach Trump. House Judiciary Chairman Jerry Nadler said Trump has attacked …