National Guard troops appear in Washington DC as mayor rejects Trump's 'authoritarian push'

The news article reports on the presence of National Guard troops in Washington D.C. amid tensions between the city's mayor and the Trump administration. According to the article, armored vehicles were spotted at various locations around the capital on Tuesday evening. The article states that the deployment of National Guard troops comes as Washington D.C. Mayor Muriel Bowser has rejected what she calls the Trump administration's "authoritarian push" to exert federal control over the city's response to protests. Bowser has criticized the president's handling of the protests and has sought to maintain local control over the city's law enforcement. The article suggests that the situation in Washington D.C. reflects the ongoing power struggle between the federal government and local authorities over the management of protests and civil unrest in the aftermath of the killing of George Floyd.