Dozens of Republican former US officials are making a group to support Democratic presidential candidate, Joe Biden, in a further sign that President Donald Trump has alienated some members of his own party.

Iran PressAmerica: The group will publicly endorse Biden in the coming weeks and its members plan to campaign for the former vice president who is challenging Trump in the Nov. 3 election, the sources said. It includes at least two dozen officials who served under Republican Presidents Ronald Reagan, George H.W. Bush, and George W. Bush, with dozens more in talks to join, the sources added, according to Reuters.

They will argue that another four years of a Trump presidency would endanger U.S. national security and that Republican voters should view Biden as the better choice despite policy differences, the sources said.

The initiative is being led by John Bellinger III and Ken Wainstein, according to the people involved, who spoke on the condition of anonymity. Both held senior posts under George W. Bush. Bellinger served as a legal adviser to the National Security Council and State Department. Wainstein served as Bush’s homeland security adviser and as chief of staff to former FBI Director Robert Mueller.

Another member of the group, the sources said, is Robert Blackwill, who served as a foreign policy adviser under both Bushes and ambassador to India under George W. Bush. The group includes some independents and officials from outside the national security arena, the sources said.

“Trump pals around with dictators. He’s a real danger,” a person involved in the group said, speaking on condition of anonymity.

The group could go public before the Democratic National Convention in August when Biden will formally become his party’s nominee, but a launch date has not yet been set, the sources said. Opinion polls show Biden with a widening lead over Trump.

Trump, who faced no significant opposition in seeking his party’s nomination for a second term in office, has drawn sharp criticism from numerous retired military leaders and former members of his administration in recent weeks. The criticism was prompted by Trump’s calls for a militarized response to protests in U.S. cities against racism and police brutality and his handling of the coronavirus pandemic.

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