Today's installment of campaign-related news items from across the country.
* CNN's latest national poll asked respondents to consider some head-to-head 2020 match-ups, and Donald Trump trailed most of the top Democratic contenders by margins ranging from three to seven points. The exception was Sen. Elizabeth Warren (D-Mass.), whom the president led by one point.
* Kansas' Democratic Party abandoned its presidential caucuses yesterday, agreeing instead to hold a primary.
* On a related note, Colorado, which is also moving from a caucus to a primary system, announced this week that it's moving its contest to Super Tuesday. The shift away from caucuses may not help Sen. Bernie Sanders' (I-Vt.) campaign, which thrived in caucus states during his first presidential bid in 2016.
* Washington Gov. Jay Inslee (D), basing much of his 2020 presidential campaign on combatting climate change, unveiled his plan this morning on reducing carbon pollution. It is quite ambitious, and it's earning positive early reviews from climate-policy experts.
* Speaking of presidential hopefuls with new policy proposals, Sen. Amy Klobuchar (D-Minn.) this morning unveiled a plan on treating and preventing substance abuse and mental illness.
* Add California to the list of states moving forward with plans to exclude presidential candidates from the statewide ballot who don't disclose their tax returns.
* And former Vice President Joe Biden continues to rack up endorsements, including picking up support from more than a third of the Democratic state legislators in Florida.