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Primary challenger Weld accuses Trump of committing treason 'pure and simple' with Ukraine call

Bill WeldWilliam (Bill) WeldRalph Gants, chief justice of Massachusetts supreme court, dies at 65 The Hill's Campaign Report: Biden visits Kenosha | Trump's double-voting suggestion draws fire | Facebook clamps down on election ads Biden picks up endorsements from nearly 100 Republicans MORE, the former Massachusetts governor seeking to challenge President TrumpDonald TrumpUS, South Korea reach agreement on cost-sharing for troops Graham: Trump can make GOP bigger, stronger, or he 'could destroy it' Biden nominates female generals whose promotions were reportedly delayed under Trump MORE in a GOP primary, said the president's efforts to pressure Ukraine's leadership into investigating former Vice President Joe BidenJoe BidenLawmakers, activists remember civil rights icons to mark 'Bloody Sunday' Fauci predicts high schoolers will receive coronavirus vaccinations this fall Biden nominates female generals whose promotions were reportedly delayed under Trump MORE's son amount to "treason pure and simple."

"Talk about pressuring a foreign country to interfere and control a U.S. election," Weld said on MSNBC's "Morning Joe."

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"It couldn't be clearer. That's not just undermining democratic institutions. That is treason. It's treason pure and simple."

Weld said Trump should be removed from office for the offense, after noting that the penalty for treason is death. He suggested being removed from office would be "a pretty good alternative" for the president.

It's unclear whether the storm will lead Democrats in the House to impeach Trump. 

Speaker Nancy PelosiNancy PelosiTrump White House associate tied to Proud Boys before riot via cell phone data Greene sounds off on GOP after Hill story 'Bloody Sunday' to be commemorated for first time without John Lewis MORE (D-Calif.) has been hesitant to take that step, partly for fear it would boomerang on Democrats in next year's elections. But pressure on her is growing from Democrats over the Ukraine calls.

The Wall Street Journal reported on Friday that Trump repeatedly pressured Ukraine's leader to investigate Biden and Hunter Biden, the former vice president's son. It is not clear, however, that Trump threatened to withhold aid to Ukraine over the issue, something lawmakers now want to investigate.

Trump has said he did nothing wrong in his communications with Ukraine. 

Weld faces an uphill climb in challenging Trump. He is one of three former GOP officeholders doing so, but some state parties have called off primaries to prevent a direct challenge to Trump. 

Trump also has broad support within the GOP, according to numerous polls.