Bob Denny

There are four competitive state Senate primaries that will be decided during Tuesday's primaries -- all are for open seats.

Can Mark Scheffel hold off Bob Denny in the 4th state Senate District GOP race? The 18th Senate District Democratic race between Cindy Carlisle and Rollie Heath seems to be going down to the wire. Jerry Call and Lauri Clapp are butting heads in the 24th state Senate District GOP race. And some think Joyce Foster is poised to win the 35th state Senate District Democratic nomination, though others don't count out Alice Borodkin.

Retired Air Force Colonel Bob Denny said Monday he'll join an already crowded SD-4 GOP race to succeed outgoing state Sen. Tom Wiens (R-Castle Rock).

Denny, a financial adviser who lives in Glen Eagle, said "it's a good time" for him to be entering politics.

"It's something I've always wanted to do, and I think I can do a good job," Denny said.