Ex-Colorado Gov. John Hickenlooper has become the latest Democratic presidential hopeful to call for impeachment proceedings against President Donald Trump.

Hickenlooper described himself Thursday as an �extreme moderate� but said special counsel Robert Mueller�s statement Wednesday spurred him to back an impeachment investigation.

On CNN�s �New Day,� Hickenlooper said Mueller �laid the responsibility clearly at the doorstep of Congress� and he thinks �we have to begin an impeachment inquiry.�

Hickenlooper said an inquiry may not lead to an impeachment vote and acknowledged the Republican-controlled Senate would never remove Trump if the Democratic-controlled House impeached him.

Democratic candidates Sens. Cory Booker of New Jersey and Kirsten Gillibrand of New York had declined to push impeachment but backed the process after Mueller�s statement .

Trump has called Mueller�s Russia investigation a �witch hunt� and declared he �did nothing wrong.�

(AP)