Against Flake, the Democratic Senatorial Campaign Committee is launching an ad that appeals to three voting blocs: veterans, women and seniors.

The ad asks, "What would Jeff FlakeJeffrey (Jeff) Lane FlakeDems sour on shutdown tactics Senate faces difficult path to immigration deal White House: Graham-Durbin immigration bill 'dead on arrival' MORE cost you?" and charges that he could cost veterans their homes, that he opposed requiring insurance companies to cover minimum hospital stays for breast cancer and that his support for Rep. Paul RyanPaul Davis RyanHouse Dems furious with Senate leaders Overnight Finance: Senate confirms Powell as Fed chair | Mulvaney declares 'new mission' for consumer bureau | Trump says solar tariffs will boost jobs GOP rep told aide they were 'soul mates,' but denies harassment claim MORE's (R-Wis.) budget would cost seniors thousands more each year.

Most of the back-and-forth in the Arizona Senate race has focused on these three voting blocs — particularly women and veterans — with Democratic opponent Richard Carmona attempting to hammer Flake for supporting policies he says are harmful to both.

The Arizona race remains a toss-up, with Carmona posting a margin-of-error lead in the most recent two polls but the state leaning toward Mitt Romney.

In Connecticut, the DSCC targets McMahon's position on Medicare — an increase of $5,000 in fees for seniors, according to the ad — and Social Security — to sunset the program, the ad says. It also notes that McMahon has spent $70 million of her own funds on her two Senate bids, making her one of the highest self-funders ever to run for the Senate.

The charge that McMahon would "sunset" Social Security is a favorite of Democrats, and refers to a comment she made at a Tea Party forum about programs like Social Security needing to be reviewed every 10 to 15 years.

Though McMahon has pushed back on the attack, accusing Democrats of taking her words out of context, it seems to be one Democrats think will stick, as they've continued to drive it home.

The Connecticut Senate race is a toss-up, but most recent polls have slightly favored Democratic Rep. Chris MurphyChristopher (Chris) Scott MurphyChuck Schumer’s deal with the devil Democrats mull keeping Senate in session overnight Live coverage: Shutdown begins MORE. McMahon, however, has managed to keep his lead to single digits and even overcome him in some polls, and she's running a much stronger campaign than she did in 2010.