Andrew Romanoff(D-CO)
If Andrew Romanoff(D-CO) had won the Democratic Nomination for the 2010 CO US Senate Election against Michael Bennet, Would Romanoff-D had won the 2010 November General Election against Ken Buck-R, the Republican Nominee? The answer is YES.
If Romanoff-D got elected to the US Senate in 2010, he would have seek re-election in 2016 and he would re-election in 2016.
Romanoff-D ran for the US House of Representatives in 2014 in CO-6, but lost in the November General Election to Republican incumbent Michael Coffman by a 9 percent margin.
In 2012 Coffman-R won re-election by a 2 percent margin. If Romanoff-D had run for the US House in 2012, he would have narrowly won.
The question is can Romanoff-D carry CO-6 in the 2020 CO US Senate Election in November 2020.