The Hill reports:
Hillary Clinton trails three top Republican presidential candidates in matchups in three key swing states — Iowa, Colorado and Virginia — a new Quinnipiac poll finds. The Democratic presidential frontrunner is slipping in favorability ratings, as well as while facing former Gov. Jeb Bush (R-Fla.), Sen. Marco Rubio (R-Fla.) and Gov. Scott Walker (R-Wis.). The GOP candidates lead Clinton outright in six of those matchups, while Clinton is still behind in the other three but within the margin of error. In Iowa, Rubio and Walker both hold an 8-percentage point lead over Clinton, while Bush would defeat her in the hypothetical matchup by 6 points. In Colorado, Walker holds the largest lead over Clinton—9 percentage points. Rubio follows shortly behind with an 8-point margin, while Bush leads by 5 percentage points.
Unsurprisingly, Trump got the worst favorability score.