It seems you’re referring to former President Donald Trump’s impeachment trials, which took place in 2020 and 2021. For clarity, President Trump was indicted by the House of Representatives, but then acquitted by the Senate twice, meaning he was not technically convicted.
After each of these impeachment trials, some Republicans criticized the proceedings for various reasons – some argued the trials were politically motivated, while others contended they were unconstitutional. However, the party did not universally agree, and there was plenty