The justice department inspector general said on Thursday it would conduct a review of the conduct of federal agents who responded to unrest in Portland and Washington DC, following concerns from members of Congress and the public. The watchdog investigation will examine use-of-force allegations in Portland, where the city’s top federal prosecutor and mayor have publicly complained. In Washington, investigators will look at the training and instruction provided to the federal agents who responded to protest activity at Lafayette Square, near the White House. Among the questions being studied are whether the agents followed DoJ guidelines, including on identification requirements and in the deployment of chemical agents and use of force. The investigation was announced amid chaos in Portland, where Mayor Ted Wheeler was teargassed by federal agents as he stood outside the courthouse there. Local authorities in both cities have complained that the presence of federal agents has exacerbated tensions on the streets, while residents have accused the government of violating their constitutional rights. Civil unrest escalated in Portland after federal agents were accused of whisking people away in unmarked cars without probable cause. In Washington, peaceful protesters were violently cleared from the streets by federal officers using teargas. The announcement on Wednesday by Donald Trump that he would deploy federal troops in US cities to address what he said was an “abdication of their duty” by local authorities to maintain law and order was greeted by analysts as a naked political ploy designed to reverse his awful approval rating in advance of the November election. “The president is trying to divert attention from his failed leadership on Covid-19,” said the Democratic mayor of Chicago, Lori Lightfoot. But the actual and potential presence of federal troops in the streets of American cities also threatened to create violence and derail community outreach that local authorities have worked for months to establish as the successive waves of pandemic lockdowns and protests on behalf of racial justice have swept the United States. The mayors of 15 large cities warned as much in an open letter to Trump this week. The mayors wrote, they said, “to express our deep concern and objection to the deployment of federal forces in US cities, as those forces are conducting law enforcement activities without coordination or authorization of local law enforcement officials.” “We urge you to take immediate action to withdraw your forces and agree to no further unilateral deployments in US cities,” the letter said. Signatories included the mayors of Seattle, Portland, Atlanta, Chicago, Washington DC, Kansas City, Boston, Philadelphia, Denver, Los Angeles, San Jose, Oakland, Tucson, Sacramento and Phoenix. The Trump administration so far has deployed unidentified agents in military-style camouflage uniforms in Portland, Oregon, and announced plans to send officers from multiple federal agencies to Chicago and Albuquerque, New Mexico. Lightfoot, the Chicago mayor, expressed provisional openness to the presence of some federal officials – if they acted in concert with local government. The US constitution gives broad power over policing and public health and safety to the states, as opposed to the federal government. The United States has no federal police force, and it is historically rare, although not unprecedented, for federal troops to be deployed against the wishes of local authorities. Less than four months before the presidential election, with a double-digit gap in the polls, Trump appears intent on setting a new precedent. “We’re not going to let New York and Chicago, Philadelphia, Detroit and Baltimore, and all of these – Oakland is a mess. More federal law enforcement, that I can tell you,” he said at the White House this week. Here is a roundup of further reaction from mayors in select cities: New York “We’ve seen the chaos secret police are creating in Portland. We won’t let it happen here.” – Mayor Bill de Blasio “It’s the same way he uses Ice as an extension of his re-election campaign,” De Blasio told the NY1 local TV station. “We have no illusions here. We do not welcome it. It will not work. Every time we’ve seen Trump do things that are illegal and unconstitutional, we challenge him in court and overwhelmingly beat him and he has to retreat. I think it’s the same scenario here.” Chicago Mayor Lori Lightfoot sent Trump a letter on Monday explaining the roots of gun violence in Chicago and steps the administration could take to help prevent it. “I would be more than happy to have my team sit down with yours to go through the actionable policy and legislative items that you can support to help make these actions a reality,” she wrote. Trump has yet to respond, apart from continuing to impugn the city of Chicago. Philadelphia “We’re opposed to that action and if the Trump administration wanted to help cities they would’ve gotten off their rear ends back in March and April and helped us with PPE and testing and contact tracing.” – Mayor Jim Kenney Washington DC “All extraordinary federal law enforcement and military presence needs to be withdrawn from American cities.” – Mayor Muriel Bowser Boston “While we have no information that Boston is being targeted, I want to make absolutely clear that behavior and that type of so-called help is not welcome here in the city of Boston. It’s being done with no communication and working with no local elected or no public safety agency in those different cities. It’s being done with no regard for the rights or safety of protesters and appears to be needlessly escalating the situation.” – Mayor Marty Walsh Denver “The president’s deployment of federal forces in our cities is wrong, and sets an alarming precedent.” – Mayor Michael Hancock Detroit “There could be no possible justification for such an action. The Detroit police department has had the support of the Detroit community in making sure our city did not have a single store looted or a single fire started during the protests. Unlike nearly every other major city in the country, the Detroit police department never requested assistance from the national guard – we handled our issues as a community. We definitely have no need for any federal presence being sent in now.” – Mayor Mike Duggan in a statement to Business Insider Oakland “Oakland needs Covid relief – not troops – from our president. He should stop slandering diverse, progressive cities like Oakland in his racist dog whistles and divisive campaign tactics.” – Mayor Libby Schaaf