The 27 former members of Congress joined a “Republicans for Biden” initiative organized by the Biden campaign to encourage Republican support for the Democrat, the Biden campaign said. They cited Trump’s “corruption, destruction of democracy, blatant disregard for moral decency and urgent need to get the country back on course” as reasons for the move, according to a Biden campaign statement.

Flake, whose opposition to Trump led the Arizona Republican to retire from the Senate in 2018, was due to speak to reporters later on Monday about his decision to endorse Biden.

The former lawmakers represent only the latest Republican group to endorse the Democratic presidential nominee and oppose Trump in the Nov. 3 election, illustrating how the Republican president has alienated members of his own party.

Last week, 73 former Republican national security officials, including former chiefs of the FBI and CIA, endorsed Biden while calling Trump corrupt and unfit to serve.

The opposition groups object to Trump’s alienation of U.S. allies abroad and his leadership at home, including his response to the coronavirus pandemic that has killed more than 176,000 Americans, according to a Reuters tally, and triggered a severe economic downturn.

The Trump campaign has described the Republican groups campaigning for Biden, such as Republican Voters Against Trump and 43 Alumni for Biden — hundreds of officials who worked for George W. Bush — as “the swamp”, disaffected former officials “trying to take down the duly elected president of the United States.”