The Republican-led Congress will attempt two heavy lifts next week when the Senate tries to advance a major healthcare bill, and a House panel votes on a budget plan that has divided GOP conservatives and moderates.

Senate Majority Leader Mitch McConnell, R-Ky., pledged he will hold a vote next week on the healthcare reform plan that has been revised to draw in moderate Republicans by maintaining some Obamacare taxes and providing additional funds to fight the opioid epidemic.

It's not clear whether the bill can attract the 50 GOP votes needed to begin debate on the measure, which also includes a provision authored by Sen. Ted Cruz, R-Texas, that aims to lower premiums by allowing health insurers to offer a range of coverage.

Many GOP lawmakers are on the fence about the bill, particularly moderates from states that would see Medicaid funding shrink substantially under a provision that curbs the program's rate of growth.

A Congressional Budget Office analysis of the bill expected early next week could also impact the vote count.

"I look forward to reviewing the revised Senate healthcare legislation and forthcoming CBO report to determine the impact on West Virginians, but continue to have serious concerns about the Medicaid provisions," said Sen. Shelley Moore Capito, R-W.Va.

If senators vote to advance the bill, there will be 20 hours of debate divided between the two parties, followed by an unrestricted number of amendments proposed by lawmakers before a vote on final passage.

In the House, lawmakers will consider major spending and budget measures in committees. The House Budget Committee is expected to mark up the fiscal 2018 budget, which will serve as the legislative vehicle for a comprehensive tax reform plan Republicans have been writing behind closed doors.

The budget is expected to propose $200 billion in mandatory cuts, a compromise number aimed at winning the support of conservative and moderate Republicans.

The House Appropriations Committee next week is scheduled to complete work on all 12 spending measures that fund the federal government.

Among the legislation is the fiscal 2018 Homeland Security Appropriations bill, which includes $1.6 billion for "physical barrier construction" along the southern border. The bill also includes more than half a billion dollars for additional immigration and border enforcement support.

The overall budget calls for spending $621.5 billion in defense funding and $511 billion in discretionary domestic spending. But Democrats, who demand equal domestic and defense spending, are expected to oppose the bill.

On the House floor, lawmakers will vote on two energy infrastructure bills.

The Promoting Interagency Coordination for Review of Natural Gas Pipelines Act would expand the role of the Federal Energy Regulatory Commission to speed up hydropower and pipeline projects.

The Promoting Cross-Border Energy Infrastructure Act would "establish a predictable and transparent process" to construct of cross-border pipelines and electric facilities," Republican lawmakers said.

The House Ways and Means Committee will hold two key hearings next week, one on revising the North American Free Trade Agreement, which President Trump intends to renegotiate, and another on simplifying the tax code.