WASHINGTON — President Donald Trump’s escalating conflict with the press took a new turn this week as three news organizations blocked from the White House sued the administration and five television networks agreed to suspend their coordinated coverage of the president. The three outlets — CNN, MS NOW and Politico — have been denied access to the White House since Sept. 19, according to information released Monday. The outlets are challenging the administration’s decision in court. The dispute began Friday, when the administration barred the organizations from the White House. By Monday, the five networks that work together to provide television coverage of the president had agreed to pause that coverage. The confrontation has drawn support from other members of the Washington press corps. Signs supporting the blocked outlets, as well as The Associated Press, CNN, MS NOW and Politico, were displayed on the White House grounds Monday. The fight comes as the administration and news organizations clash over who should have access to presidential events and how that access is determined. For the public, the stakes extend beyond individual outlets: Restrictions on reporters can limit independent scrutiny of presidential decisions and reduce the range of information available about the federal government. The lawsuits will test the administration’s authority to control access to the White House, while the coordinated withdrawal by television networks signals that the dispute has become a broader challenge for the press corps. The White House and the affected organizations now face a court battle over access, alongside an increasingly public confrontation over the role of journalists in covering the presidency.