Bloomberg observes that Sen. Marco Rubio’s support for immigration reform is dogging his presidential campaign. 

For many Republicans, Marco Rubio’s attempt to push immigration reform through Congress is a blemish on an otherwise sterling set of conservative credentials. And if recent barbs from influential movement conservatives and Republican primary front-runner Donald Trump are any indication, it may be the tallest barrier between the Florida senator and the presidential nomination.

After three strong debate performances and an endorsement from pro-immigrationRepublican billionaire Paul Singer, Rubio, the hard-charging son of Cuban immigrants, is receiving fresh scrutiny for his co-authorship of the ill-fated 2013 overhaul that would have created a pathway to citizenship for millions of undocumented immigrants. The ascent of Representative Paul Ryan, who also supports immigration reform, to House speaker last week has prompted a resurgence of fears on the right about “amnesty” if a pro-immigration figure like Rubio or Jeb Bush wins the White House.

“Rubio’s role as [Democratic Senator] Chuck Schumer’s frontman for the Gang of Eight bill should come under scrutiny,” said Mark Krikorian, an activist for more restrictive immigration policies. “There are a lot of conservatives who want to like Rubio. His task is to give them a way to forgive him, and I don’t think he’s really done that yet.”

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