By BRIAN A. HOWEY, in Nashville, Ind.

1. Mayor Pete’s Indiana problem

Here are your final power lunch talking points for the week: Pete Buttigieg’s presidential campaign now has an Indiana problem. The We Ask America Poll with registered Indiana voters released Thursday has him in third place  behind Joe Biden (33%), Sen. Bernie Sanders (23%) with Mayor Pete at 20%. Buttigieg has essentially leapfrogged his home state  to become a viable Democratic presidential contender. But as we’ve written in the past, beyond his South Bend political base and strength in that small media market, and his activities with Accelerating Indiana Municipalities where mayors from both parties hold him in high regard, he is not particularly “famous” here. Or as We Ask America put it, “Despite very loud noise from the far left of the Democratic Party and Buttigieg's popularity in the South Bend region, it seems that, for now, rank-and-file Indiana Democrats prefer a traditional party leader" to the tune of 56%.

We were struck at Buttigieg's campaign kickoff last month that there wasn't much of a presence from South Bend African-Americans, the Indiana Legislative Black Caucus or down state political leaders, though Indiana Chairman John Zody and Indianapolis Mayor Joe Hogsett were on hand. The crowd was overwhelmingly white. His neglecting his home state gives his primary rivals a few arrows in their quiver: Could Mayor Pete carry his home state, either in a Democratic primary a year from now, or against the Trump/Pence ticket in November?  Our take: Perhaps, but it's no slam dunk at this point. If no one has the nomination secured by the Indiana primary, support would likely gravitate to Buttigieg, who would be the first Hoosier in such a primary since Gov. Roger Branigin ran as a favorite son stand-in candidate for Vice President Hubert Humphrey in 1968, finishing third behind Sens. Robert F. Kennedy and Eugene McCarthy. If Mayor Pete is not viable for the presidential nomination, this poll won't make much of a case for him on the ticket. But! Mayor Pete drew a big crowd in Hollywood on Thursday.

2. Trump barely above water

Indiana Republicans would have you believe that President Trump is still phenomenally popular in Indiana. But the WAA Poll echoes other previous surveys and shows Trump barely above water  in a state he carried with 53% in the primary three years ago, and by 19% against the widely loathed Hillary Clinton. Overall, 46% of Indiana voters approve of the job Trump is doing as president, while 48% disapprove. Split along party lines, his approval is at 82% with Republicans, while 89% of Democrats disapprove. Among Independents, just 35% approve, while 45% disapprove. As for Vice President Pence, 47% have a favorable opinion, 41% unfavorable. Among independents, Pence approve/disapprove is 35/39%, while 79% of Republicans are favorable. More troubling for the Trump/Pence ticket, the national right/wrong track numbers are under water at 39/51%.

3. Holcomb wins this poll

The clear winner  in this WAA Poll is Gov. Eric Holcomb, who gets a 54% job approval, with 24% disapprove. That is consistent with other recent polls. Among Democrats, his approve/disapprove is 34/42%, and among independents it's 42/19%. Holcomb is sitting on more than $4 million in reelection funds, has no Democratic challenger in the wings  less than a year before the primary, and he's traveling the state gleefully handing out big Next Level road funding and trail building checks. The state right/wrong track is inverse of the national, at 50/34%. Among independents, it's 43/28%.

4. Trump's tariffs ratchet up

President Trump is playing with fire with his rural Indiana base. This morning his tariffs on China rose from 10 to 25%, creating great angst in the agriculture sector. This all comes as what were to be a capstone trade talks with China began on Thursday and continue today. But as the Wall Street Journal  reported, instead of preparing for a victory lap, negotiators appear to be staving off an outright collapse. Hoosier Ag Today: “This is a predicament for soy growers,” said Davie Stephens, a grower from Clinton, Ky., and president of the American Soybean Association (ASA). “We understand that Mr. Trump and his Administration have broad goals they want to achieve for our country, but farmers are in a desperate situation. We need a positive resolution of this ongoing tariff dispute, not further escalation of tensions.” In April, agricultural producer sentiment plunged as the Purdue University/CME Group Ag Economy Barometer declined 18 points  to a reading of 115, down from 133 in March. The barometer, a sentiment index, is based on a monthly survey of 400 agricultural producers across the U.S. President Trump said this on Thursday: “I have no idea what’s going to happen.  We were getting very close to a deal then they started to renegotiate the deal." On top of all this, Trump is threatening auto tariffs, drawing a warning from U.S. Rep. Jackie Walorski, saying such restrictions would "harm" the U.S. auto industry and its vast Indiana supplier network. Bottom line: It's not easy being a Trump supporter.

5. A 'constitutional crisis'

Washington is, well, simply bizarre. On Wednesday, Senate Majority Leader Mitch McConnell declared the Mueller investigation "case closed," but then Senate Intelligence Committee Chairman Richard Burr subpoenaed Donald Trump Jr. Axios  and The Hill  are reporting that Trump Jr. is likely to ignore the subpoena, just as an array of administration officials are snubbing other efforts to gain testimony on a range of issues. Speaker Nancy Pelosi echoed assertions that the nation is now in a "constitutional crisis."  President Trump appears intent on goading Democrats to seek impeachment, which he believes will help him win reelection in 2020. Trump's one big problem: Robert Mueller's inevitable testimony  on Capitol Hill  and a potential John Dean moment.

Have a great weekend, folks. It's The Atomic!