Thank you, Sarah. Today, we reported first quarter 2025 results, including strong premium and service revenue of $42.5 billion and adjusted diluted earnings per share of $2.90 in the quarter. A good start to 2025. While we manage the company as a diversified portfolio, let's go segment by segment for some insights into how we've been able to manage various tailwinds and headwinds to yield a strong aggregate result so far in 2025. Medicaid membership was stable and right in line with our expectation of 12.9 to 13 million members. The Medicaid HBR, excluding excess influenza-related costs, was approximately 93%, showing some progress compared to 93.4 in Q4 of 2024. You'll see the print at 93.6, including about $130 million of Q1 influenza-related costs above our expected. At a conference in March, we had also cited $130 million of excess influenza costs through February. And consistent with CDC data, influenza settled down as we got into March. Fundamentally, we continue to make progress matching rates and acuity, the keyword being progress, not completion. For instance, a 4/1 rate cycle representing about 11% of Medicaid revenue yielded an approximate 5% rate increase, though still inadequate for that 4/1 cohort. In areas such as MLTC, home and community-based services, and emerging high-cost drugs. So progress, but more work to do as we get through 2025 and into 2026. On our entire Medicaid book, we are projecting a full-year composite rating increase at 4% plus. Medicare Advantage and PDP both outperform on membership. We retained more membership than expected during the Medicare Advantage open enrollment period, which bodes well for long-term earnings power. This is contributing $1 billion to our 2025 premium and service revenue guidance increase. EDP ended the quarter at 7.9 million members, strong growth from 2024. Medicare segment HBR was 86.3% in the quarter, which, as we covered in past discussions, is expected to follow an inverted slope line compared to 2024 due to the Inflation Reduction Act program changes. So a lower Medicare second HBR and higher earnings early in the year and higher HBR and lower earnings later in the year. Within the Medicare segment, both Medicare Advantage and PDP businesses were on track in the quarter. And you'll see an intra-year increase in the Medicare Advantage PDR, premium deficiency reserve, that was planned for and is solely related to the sloping of earnings during 2025. So no change in our view of Medicare Advantage earnings for 2025. Commercial membership was very strong in the quarter, not just during open enrollment for 1/1, but also in February and March. Q1 commercial segment HBR at 75.0% was a little higher than last year's 73.3, driven by 1.9 million new marketplace members in Q1. These members are utilizing a little more than last year's new members, but because it's so early in the year, we are not yet recognizing a matching offset for risk adjustment. We'll know more when we get the first weekly file in late June, early July. Given top-line performance in Q1, and even as we forecast net membership attrition throughout the rest of the year, we are adding $5 billion of premium revenue to 2025 guidance related to the marketplace. Moving to other consolidated P&L and balance sheet items. Our adjusted SG&A expense ratio was 7.9% in the first quarter, compared to 8.7% last year, which decreased due to continued leveraging of expenses over higher revenues and good discipline. Cash flow provided by operations was $1.5 billion for Q1, primarily driven by net earnings. Our debt to adjusted EBITDA was 2.8 times at quarter-end. Our medical claims liability totaled $19.9 billion for Q1 and represents 49 days in claims payable, a decrease of four days as compared to the fourth and first quarters of 2024, driven by significant revenue growth in the PDP business. The decrease in days was expected given the mix impact of our PDP business, which will be a $16 billion plus business in 2025, versus $5.2 billion last year. As I'm sure you know, pharmacy claims complete much faster than medical claims, causing the mix-related mathematical reduction to DCP. Looking at the full year, we are pleased to reiterate greater than $7.25 of adjusted diluted EPS. As you've heard, the theme of the quarter was strong premium revenue growth and stronger than expected membership. Accordingly, we are increasing premium and service revenue guidance to a midpoint of $165 billion, up from $159 billion. We are also recalibrating the consolidated HBR to reflect this growth and a couple of other items. Fifty basis points is driven by one, incremental Q1 growth in the marketplace, with that growth assumed for now to be at a lower than average margin level. Two, a full-year Medicaid HBR in the mid to high 91s, inclusive of flu from Q1, and three, very high utilization of specialty drugs in non-low-income PDP members. While most of this is covered by the PDP demo risk corridor, some of it makes it to our P&L. When coupled with SG&A outperformance in PDP, we are still on track for a PDP pretax margin in the one percents. We're also lowering the consolidated adjusted SG&A ratio midpoint by 45 basis points given strong performance in Q1 and based upon our 2025 growth and mix of business. And we lowered investment income by $100 million as we reforecast cash balances and calibrated potential rate cuts. So on track for 2025 at this early point in the year, with a very strong top line creating attractive long-term earnings power. Now a few educational comments on 2026. Since much of what we do in 2025 sets us up for success in 2026. On the marketplace, there are two items that, if finalized, would impact the 2026 market size and risk pool that need to be reflected in 2026 pricing. Potential expiration of the APTCs is one that we've discussed heretofore. The second item, as Sarah mentioned, is the new marketplace integrity and affordability proposed rule released in March with provisions that would impact 2026. Looking at actuarial studies, these two items combined may cause high single-digit price increases, and that's before any baseline trend adjustments, pricing forward trend for 2026, and potential tariffs. While the proposed rule changes seem likely to get implemented, we are still optimistic about lawmakers seeing the merits of continuing EAPTCs. And over half of our states have agreed to accept two sets of rates, one with enhanced APTCs and one without, in case there's clarity by July. So rest assured, we are on top of adequately pricing for these matters. EDP, the high specialty drug trend, being partly driven by pharmacy industry behavior, will need to be reflected in 2026 bids along with the assumption that the demo risk corridor will not be repeated at the same protective level. And we'll also be thinking about potential tariff impacts when making bid decisions. Remember our discussions last year about the PDP direct subsidy substantially rising in 2025, due to forecasted IRA dynamics that landed right where we thought it would. Oh, we expect another year of a large direct subsidy increase, maybe to over $200 compared to this year's $142. Because of the intentional and maybe unintentional cost consequences of the IRS. So, again, we are focused on making adequate pricing moves coupled with a higher PMPM yield as we think about being responsible in our 2026 decisions being made in the next month or two. We are very pleased to deliver a strong Q1 and more earnings power for the future. Thank you for your interest in Centene, Rocco, we'll open the line up for questions.