SALEM, Ore. (AP) _ U.S. Sen. Bob Packwood, enjoying new prominence as architect of a sweeping tax reform package, is expected to breeze past an anti-abortion minister in Tuesday's Republican primary. U.S. Rep. Jim Weaver is favored to win the Democratic nomination for the Senate.

In the race to succeed GOP Gov. Victor Atiyeh, the Democratic nomination is expected to go to Neil Goldschmidt, a former Portland mayor who was Jimmy Carter's transportation secretary. Norma Paulus, a popular former Oregon secretary of state, leads the Republican field.

Pennsylvania also holds a primary Tuesday, with U.S. Rep. Robert Edgar and state Auditor General Don Bailey the leading contenders for the Democratic nomination to oppose Republican Sen. Arlen Specter, who is challenged by a conservative school teacher.

Democrats are also expected to decide between attorney Robert P. Casey and Philadelphia District Attorney Edward Rendell as their nominee for governor to face Republican Lt. Gov. William Scranton II in November. Republican Gov. Dick Thornburgh, is, like Atiyeh, barred by state law from seeking a third term.

In Oregon, Packwood, seeking a fourth term, is challenged for the GOP nomination by Joe Lutz, a Baptist minister from Portland making his first attempt for public office.

In the Democratic race, Weaver is giving up his congressional seat after six terms for a chance to face Packwood.

A poll released Thursday by The Oregonian newspaper in Portland showed Packwood was favored by 68 percent of those surveyed, versus 27 percent for Lutz.

Packwood, 53, has raised nearly $7 million for his campaign since his last re-election race - an unprecedented amount by Oregon standards - and had $2.7 million in cash on hand at the end of April.

Lutz reported $20,705 on hand and debts of $48,037 as of April 30.

Packwood also has been in the national spotlight since his Senate Finance Committee approved a tax overhaul plan that has won wide bipartisan support.

Lutz, 35, opposes abortion, but has not made abortion a major issue in his campaign against Packwood, a champion of the pro-choice movement.

Lutz has concentrated on economic issues, saying Packwood long has been a member of the Washington establishment whose tax-and-spend policies have led to federal budget deficits.

In the Democratic race, Weaver, 58, is being challenged by state Rep. Rick Bauman and state Sen. Rod Monroe, both of Portland.

The Oregonian poll showed Weaver favored by 58 percent to 15 percent for Monroe and 8 percent for Bauman.

Weaver has spent much time criticizing Packwood, saying the incumbent's large campaign war chest and his votes for military spending programs show he's out of step with most Oregonians.

Bauman, 36, a four-term member of the Oregon House, gained attention when he walked across the state in hopes of boosting his bid for the nomination.

Monroe, 43, a two-term state senator, made an issue of a flap over Weaver's handling of campaign funds but never made much headway against Weaver.

In the governor's race, Goldschmidt and Mrs. Paulus each faced six challengers. But the latest Oregonian poll showed Goldschmidt drawing the support of 70 percent of those surveyed over his challengers, while Mrs. Paulus was backed by 76 percent.

Goldschmidt and Mrs. Paulus aimed much of their campaigning at the general election.

Goldschmidt, 45, said Mrs. Paulus has been part of a state government establishment that's done little to pull Oregon out of its economic doldrums.

But Mrs. Paulus, 53, who also has served in the Legislature, said her involvement in state government would make her an effective governor.

Of Goldschmidt's challengers, veteran Democratic state Sen. Ed Fadeley, 56, was the only one with statewide name recognition, but he ran a low-budget campaign.

C.F. ''Corky'' Barackman, 34, of Forest Grove, works in the planning department of an electronics company, and Dave Jones, 55, of Portland, is a theater manager and former broadcast newsman.

George Thomas, 50, of Oregon City, owns a recreational vehicle sales and repair company, and Robert Forthan, 33, of Portland, is a state auto emission inspector.

Perennial candidate E. Allen Probst, 60, is a retired businessman from Albany.

Of the Republican challengers, Betty Freauf, 49, of Salem, mounted the best-financed campaign, but she never drew more than a few percentage points in the polls.

Ben Kilpatrick, 49, a Grants Pass theater employee and operator of a maintenance business, was a Josephine County commissioner for three years until voters recalled him in 1979.

Sandy Blau, 67, is a retired Portland businessman while Juan Ortegon, 34, of Cornelius, is an insurance salesman.

Joe Simpson, 51, is a Portland school bus driver while William Sparks, 42, of Beaverton, says he's an unemployed truck driver.