The junior Republican senator from Florida is expected to jump into the race for the presidency Monday. He has some strengths — but also some hurdles to overcome.
Three weeks after the Democratic front-runner's news conference about her use of private emails as secretary of state, polls continue to show her ahead of GOP contenders.
Do billionaires have too much influence in both major parties? Three top Republican presidential prospects — Sens. Rand Paul, Marco Rubio and Ted Cruz — say no.