The newest John Fetterman ads feature words of support from former President Barack Obama, the latest high-profile surrogate to involve himself in Pennsylvania's crucial Senate race.

"When the fate of our democracy and a women's right to choose are on the line, I know John will fight for Pennsylvanians," he says in both ads.

Notably, in the radio ad, Obama touts Fetterman's service on the state Board of Pardons, which opponent Dr. Mehmet Oz attacks repeatedly by accusing Fetterman of endangering Pennsylvanians by voting to commute the sentences of some convicted murderers.

"As Lieutenant Governor, John chairs the Board of Pardons and has helped people who were wrongfully convicted," Obama says.

In a statement, Fetterman said, "I am deeply grateful for President Obama's support in this race. I was proud to be one of the only elected officials in western Pennsylvania to endorse President Obama in the 2008 presidential primary, and it is truly an honor for him to get behind our campaign and cut ads for us across the commonwealth."

While the campaign noted in a press release that the ads will appear "across Pennsylvania" in the coming weeks, the radio hits began airing in the Philadelphia market this week.

–ABC News' Will McDuffie

Wednesday's placements are the second round of ad spending by the new PAC, which was launched in late September and kicked off its first round of placements in the same Senate races earlier this month.

According to ad tracking firm Ad Impact, Make America Great Again Inc.'s biggest investment in the latest ad placement was a $1 million ad buy in the race between Democrat Tim Ryan and Trump-endorsed J.D. Vance in the Ohio Senate race, followed by $770,000 in spending on the rivalry between Democrat John Fetterman and Trump-endorsed Dr. Mehmet Oz in the Pennsylvania Senate race.

Read more here.

–ABC News’ Soo Rin Kim

There's the campaign Republicans are running on inflation, crime and the Biden agenda -- a sprawling and broad case against Democratic governance that's being adjusted to fit particular circumstances in races across the map.

Then there's the campaign Democrats are running -- on abortion rights and against far-right Republicans, but also at times against the Biden White House on the southern border and the handling of inflation and the urgency under which all that and more is being addressed.

Enter, again, President Joe Biden. He makes a rare-for-this-cycle trip to battleground Pennsylvania on Thursday to campaign for Democratic Senate candidate John Fetterman-- and also to provide messaging cover for the many Democrats he isn't campaigning for in person, either because of their choice or the constraints of time.

The streamlined messaging includes stronger commitments on abortion, including Biden's vow this week that, in January, he will sign a bill to codify Roe v. Wade -- contingent on holding the House and picking up at least two seats in the Senate.

–Read more here.

–ABC News’ Rick Klein