所有的目光都集中在亚利桑那州参议员Kyrsten Sinema身上，因为民主党人希望在本周末开始就他们的主要医疗保健，税收和气候法案进行辩论。

参议院多数党领袖查克·舒默(Chuck Schumer)周四宣布，众议院预计将于周六下午就通胀削减法案进行首次投票。投票将针对一项7400亿美元法案的动议进行，如果通过，将引发长达20小时的辩论。

旨在通过一个被称为和解的过程快速通过立法，在这种情况下，法案可以以简单多数通过，面对预期的共和党一致反对，民主党需要他们核心小组每个成员的支持。

这就是西内玛的用武之地。温和的亚利桑那州民主党人偶尔会阻挠该党的议程，西弗吉尼亚州的乔·曼钦也是如此。曼钦已经加入，并声称对支出法案的最后一分钟达成协议负责。

Sinema很少公开谈论该法案，避免记者反复询问她的立场。

ABC新闻从两名知情人士处获悉，Sinema正在寻求修改《通货膨胀削减法案》，特别是删除一项条款，该条款将堵塞所谓的“附带权益”漏洞，该漏洞允许富裕的对冲基金经理和私募股权高管支付较低的投资税率。

Sinema还寻求增加50亿美元的抗旱资金。

Sinema周四从她在国会大厦地下室浅粉色墙壁的办公室来回穿梭于参议院会议厅-曾经与Manchin会面-和参议员舒默的办公室。当被问及她是否同意任何法案修改时，这位神秘的参议员告诉美国广播公司，“我不能告诉你任何事情。”

Sen. Kyrsten Sinema arrives at the Capitol for a vote, Aug. 3, 2022.

德鲁·安格雷尔/盖蒂图片社

尚不清楚这些变化会对立法结果产生什么影响。

Sinema也仍然在等待参议院议员的话-商会的无党派规则管理员-谁是擦洗立法文本，以确保每个条款符合严格的和解测试。

曼钦周二告诉记者，他和西内马讨论了通货膨胀削减法案，但没有透露她可能会在哪里着陆，称“她会考虑所有这些并做出自己的决定。”

在Sinema的沉默中，她与共和党参议员Tom Cotton和Mitch McConnell交谈的视频本周在网上疯传，尽管他们谈话的主题未知。

众议院共和党领袖麦康奈尔(McConnell)尖锐批评了该法案中的税收条款。麦康奈尔周三指责民主党人希望通过“巨大的、扼杀就业的增税”

民主党人反驳说，包括15%的企业最低税在内的税收条款不会增加年收入低于40万美元的美国人的税收——这是总统乔·拜登(Joe Biden)的关键竞选承诺之一——并将针对他们认为没有支付公平份额的企业和专业人士。

拜登在周四亲自推动该法律的通过，因为他实际上参加了与商界和劳工领袖的圆桌会议。

拜登说:“通货膨胀削减法案降低了处方药价格，降低了医疗保险费，投资于清洁能源，为企业和劳动力创造就业机会和经济机会，减少了赤字，并对我们的公司税法进行了常识性改革。”

拜登在讲话中直接向国会议员发表讲话，敦促他们“为了美国人民”通过该法案。

Democrats tee up first vote on climate, tax bill but Sinema still a holdout

All eyes are on Arizona Sen. Kyrsten Sinema as Democrats look to begin debate on their major health care, tax and climate bill this weekend.

Senate Majority Leader Chuck Schumer, D-N.Y., announced Thursday that the chamber is expected to take its first vote on the Inflation Reduction Act on Saturday afternoon. The vote will be on a motion to proceed to the $740 billion bill, which if passed will kickstart up to 20 hours of debate.

Aiming to fast-track the legislation with a process known as reconciliation, under which bills can pass with a simple majority, Democrats need the support of every member of their caucus in the face of expected unanimous Republican opposition.

That’s where Sinema comes in. The moderate Arizona Democrat has occasionally thwarted the party’s agenda, along with West Virginia’s Joe Manchin. Manchin is already on board and has claimed credit for the last-minute agreement on the spending bill.

Sinema has spoken very little about the bill publicly, avoiding repeated questions by reporters on where she stands.

ABC News has learned from two sources familiar with the matter that Sinema is seeking changes to the Inflation Reduction Act, specifically the removal of a provision that would close the so-called "carried interest" loophole that allows wealthy hedge fund managers and private equity executives to pay lower tax rates on investments.

Sinema is also seeking to add $5 billion in drought resiliency.

Sinema spent Thursday shuttling back and forth from her pale pink-walled office in the basement of the Capitol to the Senate chamber - once meeting with Manchin - and to Sen. Schumer’s office. When asked if she had agreed to any bill changes, the enigmatic senator told ABC, “I can’t tell you anything.“

It’s unclear what impact such changes would have on the outcome of the legislation.

Sinema is also still waiting for word from the Senate Parliamentarian -- the chamber's nonpartisan rule-keeper -- who is scrubbing the legislative text to see that each provision meets the strict test of reconciliation.

Manchin told reporters on Tuesday that he and Sinema have discussed the Inflation Reduction Act but didn't reveal where she may land, stating "she'll look at all of this and make her own decision."

Amid Sinema’s silence, a video of her talking to Republican Sens. Tom Cotton and Mitch McConnell went viral this week, though the topic of their conversation is unknown.

McConnell, the Republican leader in the chamber, has sharply criticized the tax provisions in the bill. McConnell on Wednesday accused Democrats of wanting to pass “huge, job-killing tax hikes.”

Democrats have countered that the tax provisions, including a 15% corporate minimum tax, won’t increase taxes on Americans making less than $400,000 a year -- one of President Joe Biden’s key campaign promises -- and will target corporations and professionals they say aren't paying their fair share.

Biden pushed for passage of the law himself on Thursday as he participated virtually in a roundtable with business and labor leaders.

“The Inflation reduction Act lowers prescription drug prices, lowers health insurance premiums, invests in clean energy that will create jobs and economic opportunities for business and labor, reduces the deficit and makes common sense reforms to our corporate tax code,” Biden said.

Biden did speak directly to members of Congress in his remarks, urging them to pass the bill "for the American people."