Good Tuesday morning. Here are some of the stories making news in Washington and politics today.
• Ahead of the midterm elections, President Trump and some Republicans are escalating efforts to tie Democrats to rampant immigration and violent crime in an effort to stoke fear in voters. Read about the campaigning.
• Mr. Trump on Monday said that a caravan of migrants heading to the United States included “unknown Middle Easterners.” There is no evidence of that.
• Treasury Secretary Steven Mnuchin traveled to Saudi Arabia to discuss efforts to combat terrorist financing and spoke with the crown prince about the killing of the journalist Jamal Khashoggi. Read about the meeting.
• Mr. Trump’s decision to abandon a nuclear disarmament treaty with Russia seems to end an important period of arms control and is causing new anxieties in Europe.
• The Trump administration announced a new policy that would make it easier for states to circumvent coverage requirements and consumer protections in the Affordable Care Act. Here’s what the policy will do.
• An argument last February between the White House chief of staff, John F. Kelly, and Mr. Trump’s informal adviser Corey Lewandowski erupted into a physical fight that required Secret Service intervention just feet from the Oval Office. Here’s…