Dear Editor, The New York Times
has a relevant July 23 article on this subject: Emily Badger. "How Trump's Use of Federal Forces in Cities Differs from Past Presidents
." New York Times, July 23, 2020.
Somewhat more precise points could be made (1-5 below), and an additional point could be made (6 below), if The Austin Chronicle
were to address this subject:
1) When President Eisenhower sent the National Guard into Little Rock, it was at the request of Mayor Woodrow Wilson Mann.
2) When President Kennedy did a federal intervention in 1962 in Oxford, when James Meredith was trying to enroll at the University of Mississippi, that occurred via backdoor consultations by the Kennedy administration with Governor Ross Barnett.
3) In 1967, Governor George Romney of Michigan (father of Mitt Romney) requested President Johnson to send federal troops into Detroit.
4) In 1968, Mayor-Commissioner Walter E. Washington from the District of Columbia requested President Johnson to deploy troops there. Johnson conversed with Mayor Richard Daley of Chicago before doing so there. Johnson sent troops to Baltimore at the request of Governor Spiro Agnew (later vice president) of Maryland
5) So none of the 1-4 interventions were unannounced, unilaterally presidentially initiated, surprises in the night. And the troops pretty assuredly would have used military-marked vehicles.
6) One of the cities that's had some unruly protests, and presumably has some crime, is Miami. Curiously, President Trump hasn't mentioned sending the feds there. Except … not curiously, because … guess what? Miami has a Republican mayor (although elected nonpartisan) and a Republican governor. Which doesn't fit the president's cities-with-Democrats-in-charge framing.