The driver of the car was later arrested by police.
The "Unite the Right" rally began Friday night and was begun by members of the alt-right, white nationalists and neo-Nazis protesting the removal of a Confederate monument dedicated to Confederate Gen. Robert E. Lee.
"Very important for the nation to hear @potus describe events in #Charlottesville for what they are, a terror attack by #whitesupremacists", Rubio tweeted.
Shortly after Gardner's tweets, U.S. Sen.
Democrat Senator Michael Bennet likewise called upon the president to denounce the violent actions.
Rubio followed suit, pressing the need for Trump to acknowledge the events that transpired. This is nothing short of domestic terrorism & should be named as such", said Gardner in one post, adding, "Mr. President - we must call evil by its name.
Gardner, the Republican senator from Colorado, in a series of tweets called on Trump to specifically denounce the violence of the white supremacists.
"Praying for those hurt & killed today in Charlottesville".
"This has been going on for a long, long time", he said.
The hate being spewed in Virginia has no place in this country. It's deeply disturbing and un-American.
Bennet echoed his upper chamber colleague, saying that the events that unfolded in Virginia are contrary to everything we stand for as a country.
Earlier in the day, President Trump posted to his personal account, "We ALL must be united & condemn all that hate stands for".
For context, keep in mind that these are not back-bench Republicans.
Congressman Jared Polis, who is running for the governorship in 2018, said voices of counter-protesters "were silenced by an extreme act of violence".
"Today's attack is not the results of 'many sides' - it's an act of domestic terrorism".
President Donald Trump is condemning "in the strongest possible terms" what he's calling an "egregious display of hatred, bigotry and violence on many sides" after clashes at a white nationalist rally in Charlottesville, Virginia.