Today's installment of campaign-related news items from across the country.
* If the previous 18 forums and debates between Hillary Clinton and Bernie Sanders left you eager for more, there's good news: the two will meet for yet another debate on the night of April 14, which is a week from Thursday.
* Charles Koch was considered one of Scott Walker's biggest backers during the governor's presidential campaign, but according to the Huffington Post, the billionaire conservative is now telling allies he believes House Speaker Paul Ryan could be the party's 2016 nominee.
* Speaking of the Koch brothers, Americans for Prosperity is launching an early, $1.1 million ad buy in support of Sen. Ron Johnson (R), a far-right senator seeking re-election in Wisconsin.
* Donald Trump won Tennessee's primary, but lining up delegates takes more work: "Threats, passionate protests and accusations of theft were all on tap at Saturday's Tennessee Republican Party Executive Committee meeting, where Donald Trump backers protested what they said was an attempt to 'steal' rightful delegates from the GOP front-runner."
* On a related note: "Sen. Ted Cruz is out-hustling Donald Trump and looks set to ensure many Arizona delegates will defect to him in a convention floor fight."
* Speaking of Arizona, some local reporters pressed Sen. John McCain (R-Ariz.) over the weekend to explain Saudi Arabia giving $1 million to a leadership institute that bears the senator's name. McCain didn't seem to appreciate the questions, which he cut off after saying he has no real control over the institute.
* Bernie Sanders is facing some criticism over his most recent, full federal tax returns, which he has not yet chosen to release. Donald Trump and Ted Cruz haven't released their returns, either.